Donald Trump is the accelerant
A comprehensive timeline of Trump encouraging hate groups and political violence.
www.vox.com

...As far back as 2015, Trump has been connected to documented acts of violence, with perpetrators claiming that he was even their inspiration. In fact, dozens of people enacted violence in Trump's name in the years before the Capitol attack, according to a 2020 report from ABC News.

In 2016, a white man told officers "Donald Trump will fix them" while being arrested for threatening his Black neighbors with a knife. That same year, a Florida man threatened to burn down a house next to his because a Muslim family purchased it, claiming that Trump's Muslim ban made it a reason for "concern." Then there are the more widely known examples, like Cesar Sayoc, who mailed 16 inoperative pipe bombs to Democratic leaders and referred to Trump as a "surrogate father"; and the mass shooting in El Paso, Texas, in 2019 that left 23 dead, where the shooter's manifesto parroted Trump's rhetoric about immigrants....