I dont think its people on the Fediverse per se.
I think its leftists in general. They aren't much different from the people they claim to be better and more "tolerant" than. They have just as much catchphrasing and judgement as the right, but of course they are correct :P
I went on Gab. There are some serious nut job racists on there. But I kept blocking them, and found that the majority of people are pretty mellow. Even un-political. But these days, everyone wants to judge things by their extremes. Which is just weird.