Because natives, slaves, immigrant and gays all choose to be crazy, rabid, fascistic bitches?

I don't think so. Feminazi works quite well precisely because radical feminists are essentially proposing (or claiming to support) gender-based fascistic policies, and even look as crazy as Hitler does in the videos of his old speeches. It even has a certain aesthetic appeal in the way it sounds.

So, yes, I think we should accept Minxy's proposal, and instead of marginalizing this group by calling them "radical" feminists, refer to them as feminazis.