I don't think they're trying to push an ideology, honetly. At least not consciously. I think they're just trying to seem like cool guys to their peers. Which to me makes it much worse. That means they'd happily support anything, as long as it was popular.
Personally, I always hated these guys, even when they were defending gaming. You could tell in their style of argumentation that they were all empty-headed imbeciles who were just parroting the talking points among their peers, who, if you got them talking about something like killing chilren in videogames (for example, in context of skyrim mods that let you do that), would suddenly do a complete 180 and condemn you as a violence-against-children suppproting probable paedophile etc. (though it was rarely that openly vitriolic).
You could see the same shit in nearly all the loudest opponents of "racism", who couldn't give you a coherent definition of what racism was to save their lives. I'm not at all surprised that being openly racist towards whites is as accepted within these particular groups as it has become. It's because they were never opposed to racism in the first place - I doubt they even understand what it actually means or why it is wrong. They just say that they are because that's what's popular among their peers.
And that's when you realize... nothing has changed. All these things we like to think that, as a society, we have progressed beyond, aren't things we have progressed beyond at all. They're just not very popular right now. But if they, somehow, came to be popular again, you wouldn't see some deep, ideologically or intellectually motivated opposition towards it, at least not to any greater degree than was the case in the past. You'd just see exactly the same shit as happened back then happening all over today.
Luckily, our institutions make it hard to go backwards on this, but institutions can be changed as well, over time; language can be reinterpreted, laws can be changed. Lots of people are quite openly already fine not just with racism (against the right kinds of people; an obviously moving target), but the suppression of speech (for the greater good), and a super-powerful surveillance apparatus beyond even the wildest dreams of the stasi (and why would you oppose it, unless you have something to hide?), etc.
... ah well. At least it'll be interesting to see how far things escalate before people realize that they've been putting their own balls in the vice along with those of their acceptable targets.