I think the correct term here would be “people who create parasocial relationships with random people on the internet” (I know, too big to call it a term). I have seen the same trait in many communities, where people go to insane lengths for their favourite person on the internet. Whether it be Anime community, K-pop community, hell, even some Taylor Swift fans will shock you with their fanaticism.

I do agree that such people exist in Gaming community as well, but comparing games to groups like Neo-Nazis, Scammers who are in their entirety represents the worst (like you cannot differentiate a good Neo-Nazi vs a bad Neo-Nazi or Scammer, all of them as bad), seems to me like making molehill into murderous volcanic mountains.