Depends whether or not you think most instances should take a stance against the far left. Personally I think the fact people treat Lemmy.ml as a generic all purpose sub rather than focusing that effort onto places like lemmy.world or lemm.ee is pretty messy and will only continue to create more and more issues. As for creating your own instance and defederating, why do that rather than just block their communities as a user if you want to avoid communist groups? Presumably there is a reason you wanted to be part of Beehaw?