I think the real communists themselves are rather silly optimists who go “real communism has never been tried”, they’re not harmful per se united their naivety is being exploited.

The problem is that those communists aren’t the ones that get deplatformed. The communists you’ll find on fringe platforms are defending the CCP and other authoritarian regimes purely because those are known for their communism. Criticise some very obvious crimes against humanity, like the Uyghur genocide the entire world is ignoring, and you’ll get accusations of “orientalism”. There are a lot of those over here on Lemmy, when more than there are nazis because the Fediverse has learned to defederate from servers tolerating nazis (often through experience running a Mastodon server).