Lemmy.ml is admin'd and moderated mostly by Marxists, so instances and users hostile to Marxists tend to disregard users of Lemmy.ml.

The instance admins and mods of some of the larger communities are self-described Marxist-Leninists, and sometimes delete comments and ban users who make comments and posts that they disagree with. Sometimes the removed comments are what most people, including most communists, would regard as basic statements of fact, like that Stalin wasn't perfect, that something bad happened in Tiananmen Square in 1989, that Ukraine's Jewish president isn't a fan of the Nazis, or that Uighurs are not universally having a brilliant time.

There's a second issue that when openly Stalinist instances like Lemmygrad (who at least used to explicitly say membership was only open to users who thought Stalin was good in their instance description) were defederated by major instances like lemmy.world, lots of users made new accounts on lemmy.ml to post exactly the same tankie nonsense (typically along the lines of Russia is fighting a defensive war and hasn't hurt anyone but even if they weren't, they'd be justified in annexing the whole of Ukraine and killing anyone who objected) as had led to the defederation in the first place.

Sometimes this leads to people not from .ml to make snap judgements about comments and posts from .ml users, when really it's just a vocal minority of nutters posting the nonsense and trying to claim that any criticism they receive is just people being brainwashed by nutters in a more neoliberal/neoconservative direction like Reagan and Thatcher.

That was my original Lemmy instance. It was weirdly fanatically communist and pro-Trump at the same time. I had a real hard time understanding what was going on other than Russian propaganda. I left for here and it's much much more understandable.

Mander.xyz, science based community that I don't think is defederated from anyone.