Why not just ban the only person who persists in talking about this crap? That's a solution that works not just for people with accounts, but everyone who reads.
You don't accept that the responsibility falls on more than just Krice? If people ignored these posts and never responded, and never built up the drama around them, do you think they would even matter? Do you think they would continue to get posted? People want to have their cake and to eat it to. They want to be able to make something big out of the things which aren't worthy of being paid attention to, then to put all the drama on Krice.
I think it's easy for white Anglosphere dudes like you and me to look at this and say no big deal, I know idiots in real life who think this kind of stuff and it doesn't really have any impact on me here or there. Not everyone's like that though.
You know, I've seen forums where they throw kind of crap out and forums where they let it fester. The ones where they throw it out work. The ones where they don't, don't.
But let's be honest. There are always people getting offended here. I can think of several over the last couple of months. They come in, share some ideas, then when their ideas are not accepted as being good ones, they get offended, throw a tantrum and say they're leaving. I'm pretty sure the "I don't like permadeath therefore it's bad" guy did one of these. Or you get the people who get offended on other people's behalf, saying things like "these kinds of discussions are why X left the forums". Amy Wang or something is a name that I've seen bandied about.
If people can't handle disagreement or criticism re: matters pertaining to roguelike games, that seems very different to me than what's being discussed in this thread.
We should take people at their word when they say they're offended about matters about which people are widely known to get offended. It's not manipulative for someone to say they don't want to deal with discussion about the oppression of male members of dominant ethnic groups in their countries of residence when it's off-topic garbage anyway.