I imagine the answer is "what's the real world?"

I'm being facetious. I don't want to assume they all fit the stereotype of nerd that never leaves his room if he can help it.

They can probably either mask their hatred well enough, or they're in a place just as bigoted, which may have fostered their convictions in the first place. They go through their interactions with the real world seething with anger and bitterness, then seek relief in video games.

At their heart, they're no different from anyone else seeking to escape the unpleasant reality through some media - be that through building a peaceful farm, fighting powerful enemies, reading a gripping story or watching sports. They can't actually fight the circumstances that cause their pain (or at least think so), so they flee instead.

It's reallly just the source of their pain that's so much more toxic, which in turn leads to a toxic result that ends up poisoning their joy in life even more. Most likely, they've been fed that poison by someone exploiting their vulnerability and unhappiness by giving their aimless frustration a target, reassuring them that someone else is to blame for their misery. It didn't lessen their misery, but at least it gave the question "why am I suffering?" a satisfying and concrete answer. "It's not you. It's not some random and unpredictable circumstance that you have no control over. It's these people that you can do something about."

Except you can't actually do anything about "these people", but you can at least construct a fantasy of an ideal world without "these people", where naturally you're doing much better too. In the specific case of the toxic gamers, they're looking to video games for manifestations of that world, for places they can immerse themselves in and be free from the troubles of the real world.

If these games fail to sate that fantasy, to provide an environment they seek where they're powerful and "safe" from all the things that make them upset, that rage is taken to the forums and echo chambers where they share their suffering with each other to ease and validate it. It's one thing if there's some niche indie game made by "these people" - they're on the outskirts of the gaming world, you can easily ridicule or ignore them. It's another thing when there's a game placed front and center, getting all the attention and hype for a moment, and that game is full of things that hurt you.

For a twisted comparison, imagine if a new game got all the hype and (positive) attention, despite being full of Nazis, presenting them as entirely normal or even good people. You'd (rightly) be upset too. The difference - aside from the subject - is that your upset lilely isn't born from a stock of thoroughly curated hatred and anger. You'll probably not muster the same rage as these people, because you don't have it bottled up already.

I say this because I've been a hateful person too once. Not as bad as some of these specimens, but bad enough to know the spiral and to guess how much unhappier I could have been, how much unhappier they must be. They're victims turned abusers, and while that doesn't excuse their behaviour, it may help us understand where it comes from and give us an idea of what to fight:

Bigotry is born from misery seeking an outlet, fertilised by ignorance, nurtured by confirmation bias. The better our lives get, the less reason to look for someone to blame. The more we learn to think critically and question the lies we're fed, the less that "someone" will be a convenient target keeping us in the spiral. The more we're exposed to things that contradict our bias, the weaker it will get.

The last bit is what broke me out of the loop, the second is what saw me crawl back up the spiral and unravel my convictions.

Life's still tough, but at least it has gotten a lot less hateful and miserable since I stopped feeding the hate and blaming others for my own deficiencies and started working on myself.

A lot of people suck in the real world.