Members of the New Black Panther Party protest near the site of the Republican National Convention on July 16 in Cleveland. (Justin Sullivan/Getty Images)

Micah Xavier Johnson, who killed five police officers in Dallas, was increasingly drawn to black nationalist ideology and attended several meetings of the People’s New Black Panther Party.

Gavin Eugene Long, who killed three officers in Baton Rouge, said he belonged to the Washitaw Nation, an obscure black nationalist group that claims ownership to the huge swath of the United States obtained in the Louisiana Purchase on the belief that they are descended from a U.S. indigenous group.

The People’s New Black Panther Party and the Washitaw Nation have vastly different ideologies and no direct ties to each other, but they are part of a broad landscape of black nationalist groups playing a role in the country’s violent summer 2016.

“There are a few big groups and a lot of little ones, and they are growing in an echo chamber where all they hear is ‘anger, anger, anger, anger, anger,’ ” said J.J. MacNab, an author and George Washington University researcher who specializes in ­extremism.

Some of these entities espouse extremist, anti-government views, and their numbers jumped from 113 groups in 2014 to 180 last year, according to the Southern Poverty Law Center, which tracks extremism.

Ryan Lenz, an SPLC analyst, said that increase has partly been a response to a rise in white supremacist and white nationalist activity amid the racially charged environment of the past two years, including the 2016 presidential campaign. For example, SPLC figures show that the number of Ku Klux Klan chapters increased from 72 in 2014 to 190 last year.

Loyal White Knights Grand Dragon Will Quigg of Anaheim, Calif., center, shouts to protestors during a “White Pride” rally in Rome, Ga., on April 23. (Mike Stewart/Associated Press)

“There is tremendous racial tension in this political environment,” Lenz said. “The idea of an ‘us-versus-them’ ideology is being pushed very heavily no matter what political camp you are from.”

Analysts said it is impossible to determine exactly how many people are involved in black nationalist groups. But officials at both the SPLC and the Anti­Defamation League, which also tracks extremism, said the numbers are probably in the hundreds at most. A former FBI official who supervised domestic terrorism cases in recent years also said, “We are talking dozens of people.”

A numbers game

Most of the black nationalist groups have formed in response to a perception that U.S. society is deeply racist against black people. However, how they organize and what they do to achieve their goals vary greatly.

Some seem to exist only as online forums for expressing rage, often against police. One group Johnson had “liked” on Facebook was the African American Defense League, which has a photo of an arsenal of guns as its profile picture.

Even though the group has more than 1,000 likes on Facebook, Oren Segal, director of the Anti-Defamation League’s Center on Extremism, called it “one guy with a Facebook page” and limited influence.

Following the 2014 shooting of Michael Brown by police officer Darren Wilson in Ferguson, Mo., the Anti-Defamation League said the site featured a photo of Wilson with this notation: “When you find Darren Wilson you know what to do! Whoever finds him knows what must be done! Take everything that he took from Mike Brown.”

According to the Anti-Defamation League and the Southern Poverty Law Center, membership of black nationalist groups numbers in the hundreds at most. (Justin Sullivan/Getty Images)

A similar group, the Black Riders Liberation Party, which calls for armed revolution against racism in the United States, has a Facebook page with more than 9,600 likes. It is run by a man who calls himself General T.A.C.O. — short for “Taking All Capitalists Out” — and who calls police “pigs.”

This month, the group posted on its Facebook page in response to police killings in Louisiana and Minnesota: “It’s on in 2016! R.I.P. to Alton Sterling in La and Philando Castile in Minnesota! We need recruits everywhere! Arm yourself or Harm yourself!”

Segal said those smaller groups “orbit around” the New Black Panther Party for Self Defense (NBPP), a black militant separatist group started in Dallas in 1989, but that they do not directly coordinate their efforts with them.

Other groups are larger and more formally organized, holding meetings and attending rallies, often wearing the classic militant uniform of black clothes and a black beret. In some cases, they carry weapons.

Analysts said some of those groups, particularly the NBPP and the People’s New Black Panther Party, an offshoot formed two years ago, attempt to take prominent roles at demonstrations to create the impression that they are bigger than they actually are.

The NBPP and other black nationalist groups have attended protests over the highly publicized deaths of black men at the hands of police in Ferguson, New York, Cleveland, Baltimore, and most recently Louisiana and ­Minnesota.

Dakeria Anderson, 9, protests with the her sisters D'liyah, 6, and D'anyriah, 8, across the street from the Triple S market where Alton Sterling was shot and killed in Baton Rouge on July 11. The other side of the sign reads: No justice no peace. (Bonnie Jo Mount/Washington Post)

Washington Post reporters covering protests at last week’s Republican National Convention in Cleveland saw a small group of protesters wearing Black Panther logos on their clothes, but they were not armed.

The People’s New Black Panther Party and a sister organization, the Huey P. Newton Gun Club, hold semi-regular demonstrations in the Dallas area, in which members often carry long guns and dress in military clothes in a display of strength against the oppression of blacks in the United States and “to let people of color know that it is legal to carry weapons,” said Babu Omowale, who said he is the group’s “minister of defense.”

“We want every black man and woman throughout the country to legally arm themselves,” he said in an interview with The Post. Omowale said Johnson, the Dallas shooter, came to several of the group’s social meetings but never attended any of those armed events.

Omowale said his group and its supporters see the police as “basically a military unit inside the black community,” so when they are in public facing off in a protest against a white supremacist group, as Omowale said they did a few months ago to defend a local Nation of Islam mosque, they carry guns.

Omowale and other party members and supporters, some bearing arms, were marching at the peaceful demonstration in Dallas on the evening that Johnson started shooting.

“A few of the comrades who are part of the community got arrested — and they were basically arrested because they had on military-looking clothing,” Omowale said. “One of the brothers had a flak vest. But all of these things are perfectly legal.”

On the fringe

In other cases, police have accused followers of black nationalism of plotting violence. Two men who met at the Ferguson protests were convicted last year of plotting to target law enforcement with guns and bombs. FBI officials said the two were affiliated with the NBPP, although the group denied this in a statement.

Members of the New Black Panther Party march in front of the Baton Rouge Police Department headquarters after the death of Alton Sterling, who was killed by police. (Max Becherer/Associated Press)

Many of the leaders and organizations that make up the ongoing and nonviolent Black Lives Matter protest movement are reluctant even to discuss black militant groups, arguing that these are outliers and that paying attention to them provides them vital oxygen.

“Every black person in America has an issue with the fact that the police are killing black people disproportionately,” said Kayla Reed, an organizer in St. Louis who became an activist after Brown’s death. “People have a right to identify with the movement or say ‘black lives matter,’ but we can’t possibly be typecast based on the actions of any individual who uses a slogan.”

Since 2015, The Post has created a database cataloging every fatal shooting nationwide by a police officer in the line of duty.

Reed recalled nights in Ferguson when some of the more­militant groups would attempt to co-opt protests organized by nonviolent organizations. Members of groups such as the NBPP would show up at a demonstration and conduct interviews with journalists in which they claimed credit for the gathering. Then, she said, political opponents of the protest movement would use those statements to demonize all black activism related to policing.

“The groups in our movement have been teaching and advocating nonviolent direct actions; it’s been a consistent theme since Ferguson,” Reed said. “It’s very easy to target and smear the group demanding change; it’s much harder to give us equity and actually listen to us.”

Analysts said the NBPP is the largest of the current black nationalist groups. National Chairman Hashim Nzinga recently told the Reuters news agency that his group has 36 chapters around the country, but he declined to reveal membership numbers. Phone calls and emails to the group seeking comment were not ­returned.

The SPLC has described the NBPP as “a virulently racist and anti-Semitic organization whose leaders have encouraged violence against whites, Jews and law enforcement officers.”

In an official statement disavowing the Dallas shooter, the group’s “National Central Committee” blamed “rabid, sick, twisted law enforcement agencies” for the recent deaths of black people by police.

The statement also noted that Johnson, a former Army soldier, received training from “your American Military.”

“The kind of training that ultimately, Mr. Johnson used against your officers in Dallas, TX,” the statement said. “White America, you must deal with what you produced, and that includes your very own racist hatred.”

The NBPP has been involved in various controversies. In 2009, the Justice Department filed civil charges accusing the group of voter intimidation in Philadelphia during the 2008 presidential election. A local NBPP leader appeared at a polling place and made what the government considered threatening and racist comments. The charges were later dropped.

The People’s New Black Panther Party, meanwhile, is seeing “exploding” growth this summer, said Yahcanon, who said he goes by one name and is the group’s “national minister of information” as well as the head of its Houston chapter.

He declined to disclose how many members the group has.

Yahcanon said his group does “not condone any violence,” but “we understand when people take matters into their own hands and lash out at law enforcement.”

“Anytime you oppress a people, you’re going to have backlash,” he said.

A demonstrator protesting the shooting death of Alton Sterling is detained by police near the headquarters of the Baton Rouge Police Department on July 9. (Jonathan Bachman/Reuters)

Black nationalist groups have been around for decades protesting, and occasionally lashing out violently, against what they see as deeply rooted racism in U.S. society. They often advocate a separate black nation and armed “self-defense” groups to protect blacks from racial oppression and violence, particularly from police.

The original Black Panther Party was founded in 1966 as a response to police brutality in California, and its members frequently clashed violently with police. But several of the group’s original members have denounced the NBPP as racist and too extreme.

Yahcanon said his group split off from the NBPP because of the same concerns. He said that he believes the NBPP’s rhetoric is too violent and that his group is trying to follow the philosophy of the original Black Panthers.

“We don’t hate whites; we aren’t against anybody,” Yahcanon said.

He said his group supports the establishment of a separate “Republic of New Afrika” in Louisiana, Alabama, Mississippi, Georgia and South Carolina — an idea first proposed in the 1960s. He said that those states should become a black-only nation and that current non-black residents “are just going to have to move out.”

Nation of one

Long, the Baton Rouge killer, appeared intrigued by a distinct strain of black anti-government extremism.

The Washitaw Nation is a tiny part of the “sovereign citizen” movement, a subculture of anti-government extremists who have declared themselves sovereign and not subject to any laws.

Members of the New Black Panther Party stage a protest near the site of the Republican National Convention on July 16 in Cleveland. (Justin Sullivan/Getty Images)

In 2014, sovereign citizens were listed as the top U.S. terrorism concern in a Department of Homeland Security-backed survey of hundreds of U.S. law enforcement officials. Sovereigns are often violent, and the FBI says such figures have killed at least six law enforcement officials since 2000. Oklahoma City bombing conspirator Terry Nichols was a follower of sovereign ideology.

An increasing number of African Americans are sovereigns. The members of the largest group call themselves “Moorish” and often engage in elaborate scams, nuisance lawsuits and illegal squatting on properties that do not belong to them.

In the late 1990s, the Washitaw Nation became infamous across Louisiana and Texas for fraudulent schemes centered on identification cards and license plates branded with the name of the Washitaw Nation. In February, New Orleans police arrested four members of the Washitaw Nation after they illegally occupied a house and showed police a fraudulent deed.

At the time of his death, Long was carrying a Washitaw Nation identification card. Last year, he filed paperwork in Jackson County, Mo., to change his name to “Cosmo Setepenra,” claiming that he was part of the Washitaw Nation.

People pose for photographs with members of the New Black Panther Party after they announced their intent to protest the death of Alton Sterling at the Baton Rouge Police Department headquarters. (Max Becherer/Associated Press)

A longtime friend of Long’s said he was surprised to see media reports suggesting that the shooter’s ties to the Washitaw Nation somehow fueled his anti-law­enforcement beliefs. Felix Omoruyi, 29, of Dallas, said Moorish beliefs became trendy among their friend group of young black men several years ago.

Omoruyi, who is Ni­ger­ian American and was born in Missouri, said he has never claimed affiliation with the Washitaw Nation or any Moorish groups. He said Long, who traveled extensively in Africa, believed that his roots were African. He said it would not make sense for Long to claim to be descended from an indigenous group in the United States.

Whatever Long’s bizarre beliefs were, he and Johnson shared some common convictions and goals, said Mark Pitcavage of the Anti-Defamation League.

“They were both associated with fringe ideas and causes,” he said. “What they shared was a strong response to police violence against African Americans and what they perceived as unjust killings.”

Amy Brittain in Baton Rouge, Abigail Hauslohner in Dallas, Wesley Lowery in Cleveland and Adam Goldman in Washington contributed to this report.