At this point, everyone should know who this guy was. But for those who don't:

Elliot Oliver Robertson Rodger, known simply as "Elliot Rodger", was an incel virgin who, fed up with still being a virgin, decided to commit a massacre during 2014. Yes, you read that right.

The 2014 "Isla Vista killings".

This son of a bitch first stabbed his two roommates and a friend of one of them, then went out into the street and not only shot people, but also used his BMW to run over more victims. Yes, a BMW 328i Coupé; to top it all off, this guy was not only a virgin loser, but also a spoiled rich kid. His father was Peter Rodger, a filmmaker who worked as second unit director on the well-known 2012 film "The Hunger Games."
This sex-starved madman killed 6 people and injured 14 others. He also tried to set fire to a sorority row house because of his hatred of women.

This case is well known because the killer had a YouTube channel (now deleted) where he talked about his sexual frustration before the killings and where he uploaded a video before committing his massacre titled: "Elliot Rodger's Retribution." He also wrote a 137-page manifesto and sent it to 34 people by email (family members, acquaintances, and therapists).
I had the opportunity to see his channel before it was deleted, after Elliot had already carried out his plan. I remember that his playlist of liked videos included videos of the soundtracks of several Pokemon games (perhaps that is why there are even Otakus who idolize him).

This case is well known, and Elliot's influence is dangerous as well as pathetic, given that his actions inspired other attackers with similar ideas. See: Christopher Sean Harper-Mercer, perpetrator of the 2015 Umpqua Community College shooting, and Alek Minassian, perpetrator of the 2018 Toronto van attack.

And today, he still has an incel cult on the internet that idolizes him.
To no one's surprise, his incel fans even gave him nicknames. Some of them are: "The Supreme Gentleman", "Saint Elliot", and "E.R.".

https://en.m.wikipedia.org/wiki/2014_Isla_Vista_killings