To be fair that shit has pervaded absolutely everything in at least burgerstan if not most of western yurup as well, not just imageboards/the internet.
There's probably a very real push towards another massive war happening right now, because a lot of this shit seems heavily manufactured, like that retarded marketing shit with the Joker movie where mass media was hyping up "incel gamer mass shooter" warnings.
Sure, it was obviously for marketing (worked fucking great apparently), but there's no way anyone with half a brain could possibly miss out on the insidious shit it puts into normalcattles' minds, or how it further alienates and demonizes awkward, lonely young men who like video games.
To me that comes across as nothing less than deliberately trying to start some shit, and it's not just limited to sex crazed normalfags harassing kisless virgins, it's everything that can be split into diametrically opposed factions.
Even ridiculous stuff like whether or not someone likes nigger collide can immediately turn into a potentially violent argument just because of that stupid kneeling bullshit that the media ran with awhile back.
This post is autistic rambling, but tl;dr a lot of this animosity you see was probably deliberately manufactured