it really only takes the most basic of googling to figure this out. the 'movement' started out to harass a particular game developer, and then grew out toward gamers of all stripes that suspiciously weren't straight white men. Sure there was non straight white men in the movement, but a nonzero amount were fake (it pretty easy to spot usually) and its not like people are not capable of buying into their own oppression. There may have even been people there that came at it from a legitimate complaint about games journalism, but that was only ever a front for a harassment campaign that ended peoples careers, threatened people's life and livelihood, and in at least one case, caused a transgender game developer to kill herself
look, even if were putting aside the actual issue of cyber-bullying (which we shouldn't its an incredibly important issue and just saying 'get off the internet' is embarrassingly tone deaf), harassment mobs online lead very quickly to tangible danger. there are countless stories of people having to leave their homes for their own safety because their addresses get posted. bomb threats getting called in whenever a prominent feminist gamer speaks at an event. swat teams getting called on people who are statistically more likely to be killed by police.The block button exists for a reason. As does physically stepping away from the internet. If mean comments on the internet, even a lot of them all at once, can endanger your health, then you should probably not be on the internet.
I get death threats online on occasion. I usually laugh it off. Sometimes I'll block the person, other times I won't bother.
John Bain, and men like him, have done actual tangible harm to the people around him and the video game industry as a whole is worse as a result of his actions. That cannot and doesn't get to be swept under the rug just because he died.