It seems like a lot of Lemmy users are slightly radical american “leftists”. This is an example of this on Lemmy.world. It seems that some users see Lemmy as a forum for politicly “left”-leaning americans, not a general purpose forum. Maybe some people prefer an echo chamber?
I for one like an open and public forum that allows for opinions I don’t agree with. A diversity of opinion definitely seems like a big plus to me.