Pretty sure haters getting blocked/kicked is a thing for every single community of any kind, I mean, of course that happens. Hell, Youtube comment is on an entire level of stinker hole when it comes to moderation where it allows people to literally censor (using it loosely) each other for literally no reason needed; I highly doubt merely blocking haters itself is that big of a deal.
Yeah I mean, okay, I don't fancy boy/girl/gay/dinosaur/whatever-only club either as that sounds like echo chambers to me and may carry discriminating narratives, but that's imo and it's not like OP is making some random supremacist or separatist group now, I mean there is no evidence pointing so hence why assume it to be the case off the bat?
Don't quite get the knee jerk hate, personally.
EDIT: For example, someone throws a partly that only allows gamers in it. Now, you might claim it to be discriminating, but you can also say it's just the theme, but what you can't claim right off is saying that it's a supremacist party saying gamers are more special and better than non-gamers. If you arrive at the last conclusion first before anything else, people would probably think you're judgemental. See the point?