Secret Service Report - One-quarter of mass attackers driven by conspiracy theories or hateful ideologies

"One attacker had started subscribing to an online message board about 18 months prior to his attack," she said. "He later told law enforcement that that’s when he became radicalized and started hating Jewish people.”

There was a time when I thought conspiracy theories were humorous and harmless. Not anymore.

https://www.nbcnews.com/news/us-news/one-quarter-mass-attackers-conspiracy-theories-hate-rcna67298