Many mass murderers are misanthropes, along with some serial killers; however, most of the latter simply commit their heinous acts for sexual release, rather than to make any misanthropic statement.
The perpetrators of the Columbine High School Massacre were notorious misanthropes, discussing how they hate, "n****rs, sp*cs, Jews, f***ing whites," in the infamous Basement Tapes. This is despite the claims of the media that they were racists and white supremacists.
Misanthropes hold a general hatred of humankind, along with extreme cynicism, and studies have shown that young men with Asperger's Syndrome are much more likely to become misanthropes. Misanthropes are often nihilists and atheists, and are also often psychopaths and sociopaths. The vast majority of murders and genocides are committed by misanthropes.
Misanthropes tend to be anti-Christian, since Christianity is the world's dominant religion. Many are also militant atheists, and anti-Semites due to the delusion of Jewish world domination.
They also have superiority complexes. In the 2010s, a total of 25 people were murdered by sexually frustrated misanthropes identifying as "incels."
Margaret Sanger, Planned Parenthood, and the eugenics movement were intensely misanthropic. Leftists and secularists are also misanthropic, and therefore side with anti-Western forces such as communism and Islamism (with many even converting to these ideologies), and despise themselves equally as much as everybody else.
Anti-capitalists are often misanthropic, and frequently advocate for the destruction of Wall Street and the murder of the 1%. This includes both the fascists and communists of the 20th century, as well as the self-hating Western "anti-fascists" today.