Some communities there are literally calling for the annihilation of Ukraine
https://programming.dev/comment/1999097
edit: Since people are either willfully or otherwose are missing my point, this is a pro-russia, pro-fascist hate group, therefore we shouldn't give them the platform to spread their shit. this is not about me seeing their community or then causing issues accross other communities, it's about de-platforming fascists.
The difference for me (single user instance, defederated from hexbear and not the nazis yet), is that I've never seen the Nazis comment on any posts, but I saw the hexbear fascists comment en masse on tons of posts.