I'm surprised at how many people haven't heard of incels. One of the most known ones is that guy who went on a stabbing and hooting spree in Santa Barbara, CA in 2014. He specifically targeted the Alpha Phi house because he thought they were the "hottest" and he wanted to get retribution on all of the girls he couldn't sleep with.
Link:
https://www.bbc.com/news/world-us-canada-43892189
The anti-sorority theme has been seen a few times with incel cases. That is not surprising as, on the whole, sorority women are seen and beautiful and successful.....the things that agitate incels the most.
More info:
https://www.thetrace.org/2019/05/inc...ista-shooting/