Police were examining this video posted on YouTube in which a man who identifies himself as Elliot Rodger says he is planning an attack in Isla Vista because he had been snubbed by women. Editor's note: This video contains language that some may find disturbing. (YouTube)

The massacre Elliot Rodger perpetrated on and around the University of California, Santa Barbara last Friday night, in which he killed six people, wounded 13 others and then killed himself, is horrible both for what makes it unique and what makes it familiar. Young men kill their fellow citizens and students with unnerving regularity in the United States. But Rodger left behind a detailed and clear-headed autobiography detailing his intense rage at women, the men with whom they chose to have sex and relationships and his own lack of sexual and romantic experience.

University of California, Santa Barbara (UCSB) students Jason Dahn, 20, (L-R), Ariana Richmond, 20, Melissa Barthelemy, 36, and Lisa Kitson, 20, march to Elliot Rodger's apartment in a protest against sexual violence and hate crimes, in the Isla Vista neighborhood of Santa Barbara, California May 26, 2014. Twenty-two year old Rodger killed six people before taking his own life in a rampage through a California college town shortly after he posted a threatening video railing against women, police said on Saturday. REUTERS/Lucy Nicholson (UNITED STATES - Tags: CRIME LAW CIVIL UNREST)
A protest against sexual violence and hate crimes in the Isla Vista neighborhood of Santa Barbara, Calif., on Monday. (Lucy Nicholson/Reuters)

The intense parsing of Rodger’s manifesto and discussions of the internet subcultures he had contact with make it easy to forget that he was only the second person to put University of California at Santa Barbara in headlines this year. The school became the subject of national debate when students there asked that UCSB professors be required to provide detailed explanations on their syllabuses of which potentially traumatic material their pupils might encounter during the semester.

It may seem odd to link a mass killing and what seems like a rehashing of old debates about campus culture, freedom of expression and intense political sensitivity. But these two very different events at UCSB speak to different aspects of a deeply broken culture.

UCSB students are hardly alone in requesting trigger warnings. But the university became a particularly prominent example after a second incident, in which Mireille Miller-Young, an associate professor in UCSB’s feminist studies department, allegedly clashed with pro-life protesters on campus. Miller-Young, who was pregnant at the time, said that seeing the protest had prompted the sort of traumatic response UCSB students hoped to avoid in the classroom with the help of trigger warnings.

It is easy to mock college students who seek trigger warnings on their syllabuses, or a professor who uses the idea of “triggering” to excuse behavior that is unbefitting someone who responsible for educating  and uplifting young people. Over the past couple of months, as this debate has played out in any number of national publications, my thinking on trigger warnings has shifted somewhat. I still have no intention of using them in my work, and I would not support their use in classroom settings. I have come to see requests for trigger warnings, though, as an important sign of despair, an indicator that something is broken in the environment from which the requests come.

Online, trigger warnings act as an acknowledgement that much of the wilderness of the internet is untamable. If the conversations that take place in many comments sections and fora cannot be restored to civility, trigger warnings are an attempt to carve hamlets out of these dark forests, providing places where weary pioneers can at least be forewarned of the terms of discussion.

On college campuses, it seems no mistake that calls for trigger warnings have sprung up at the same time that the country is trying to reckon with the failures of many colleges and universities to create safe environments for their students. In late April, the Obama administration released a major report on sexual assault at college campuses and the way institutions of higher learning respond to allegations that one student has attacked another. The Education Department has cited some schools, including Tufts University, for failing to protect their students’ civil rights.

If campuses are dangerous, unpredictable places, students’ attempts to make their classrooms an environment where they know what to expect may be less an expression of over-sensitivity than a white flag of surrender. Calls for trigger warnings may be less a sign that political correctness has taken over the academy than a sign that colleges and universities are failing to live up to their basic obligations to keep their students safe.

Elliot Rodger was not a student at the University of California at Santa Barbara. He had been enrolled in and dropped out of Santa Barbara City College. But he planned to attack, as he put it in a detailed autobiography he e-mailed to his parents and therapist, “the very girls who represent everything I hate in the female gender: the hottest sorority of UCSB.”

Rodger, by his own accounting, never made actual advances to any woman. As a result, he never experienced any rejection of romantic overtures. But he hated women anyway. His plan for a slaughter at a sorority house was actually a diminution of his vision of a world where women were starved to death en masse, freeing men of sexual desire. Rodger would compromise further. When the women of Alpha Phi did not answer the door when Rodger knocked on it, he killed women who simply had the misfortune to be near the sorority house.

Rodger is not the first man to commit mass murder at or near UCSB. In 2001, David Attias, then a freshman at the university, killed four people with his car. Like Rodger, he cited romantic disappointment as a motivation for his murders. Unlike Rodger, Attias lived and was sentenced to 60 years in a mental health facility. In 2012, he was awarded a conditional release, though his incarceration included a number of incidents that suggested Attias continued to have issues with sexual boundaries and sexual entitlement.

Rodger and Attias’ crimes alone might be enough to make UCSB students feel uneasy about the school environment and what malevolence might lurk in the hearts of their peers. But it is not only grandiose killers like these two young men who influence the environment at UCSB and nearby Isla Vista.

As Nick Welch reported in the Santa Barbara Independent this weekend, the mainstream sexual and social culture from which Rodger felt excluded poses its own dangers.

“This year’s much-berated Deltopia celebration [which Rodger considered, then rejected, as a target], for example, erupted into an out-of-control riot six weeks ago,” Welch wrote. “Just two weeks before Deltopia, Sheriff’s deputies and the Isla Vista Foot Patrol found themselves forced to quell a Saturday-night mini-riot. In both instances, law enforcement officials have blamed outsiders for instigating the violence. . . . The laissez-faire attitude of the community at large toward Isla Vista bacchanalian extravagance was at least temporarily shocked earlier this year by a pair of uncommonly violent gang rapes. And while UCSB has yet to attain the notoriety of other universities tainted by allegations of consequence-free sexual assaults, the problem clearly exists here. Already, it has drawn the attention of Janet Napolitano, the new head of the UC system.”

Elliot Rodger may have been unique in his lethality, but the unusual scope of his violence does not mean that his ideas were alien to the college ecosystem in which he stewed, killed and committed suicide.

My colleague Ann Hornaday argued this weekend that Rodger’s resentments may have been fueled in part by a culture that promulgates the idea that an ideal college experience “should be full of ‘sex and fun and pleasure.’” She might have added that people who pursue that dream of a four-year rager with more success that Rodger can still do great harm to themselves and others.

In the days to come, we will revisit conversations about gun violence prevention, mental health care and the intersections of these policy issues. A wide-ranging discussion about everything from the consequences women face for turning down romantic advances to structural bias in any number of industries, organized under the hashtag #YesAllWomen, is underway on Twitter.

My hope is that, as we fumble forward, we can acknowledge that the sexual culture by which Elliot Rodger felt personally affronted does a far graver disservice to many other people. Neither Rodger nor anyone else has a right to sex or female attention and affection. But we all deserve an environment in which we can pursue sex and love with respect for others and without fear of violence or shame for ourselves.

Alyssa Rosenberg blogs about pop culture for The Washington Post's Opinions section.