Well I think that is strength of Lemmy, everyone can have space on their own without anyone shutting them down, of course if crimes are commited this is a question for law authorities. If you don't want to see their content, you can either defederate or block their community.
I really don't understand this thinking that you cannot tolerate people with different opinion than yours to exist on the internet. Again if they break any laws, you can report it to authorities.