People take part in candlelight vigil following a mass shooting at Umpqua Community College in Roseburg, Oregon October 1, 2015. REUTERS/Steve Dipaola

The first chart in this post originally contained an error. It has been updated.

The Oregon shooter who killed nine people at Umpqua Community College on Thursday reportedly singled out Christians for slaughter. Witness Anastasia Boylan told CNN that the shooter, identified by U.S. law enforcement as Chris Harper Mercer, said to one student as he fired at her:  "[B]ecause you’re a Christian, you’re going to see God in just about one second."

If authorities ultimately determine the mass shooting was a hate crime, it would be the second such massacre this year. In June, a gunman killed nine people at an AME Church in Charleston, S.C.. The shooter was ultimately indicted on 33 counts of hate crimes. However, authorities were still gathering details Friday and it's not yet clear the degree to which anti-Christian beliefs may have motivated the killer.

[Oregon shooter said to have singled out Christians for killing in ‘horrific act of cowardice’]

The best measure of how much hate motivates crime comes from the FBI's hate crime statistics. According to 2013 data, race is the most common motivation for hate crimes, representing nearly half of all hate crimes. Religiously motivated hate crimes represent about 17 percent of incidents.

However, crimes against Christians are fairly rare. In 2013, offenders committed 105 hate crimes against Catholics and Protestants. Jews faced the most hate, with 625 incidents, followed by Muslims, with 135 incidents.

[This is what one year of gun deaths in America looks like]