Lemmy.ml is also full of raging tankies. Most of the instances refuse to federate with lemmygrad because its well, lemmygrad. But that don't mean they can't get in other ways. Hell the Lemmy founders are raging communists. Hence why I'm on Sh.itjust.works and not on lemmy.ml
Lemmy.world seems okay as well. But honestly... You could run a personal instance pretty easily to federate and defederate with whatever you want and not what someone else wants.