Nobody asked for one, but I got a pretty good explanation for why this is what why this is happening.
ML's on lemmy are predominantly of the "deprogram" variety (in reference to the deprogram podcast and r/thedeprogram being quite large on reddit), and generally they're a laughing stock given the narratives they parrot that are so de-attached from the material reality and their various mannerisms when it comes to arguing. One of the larger narratives is that the west and western imperialism is horrible (which is true), and that whoever is opposed to it must be a force for good or something, which manifests as uncritical support for China, Russia, Iran even though they're both imperialist bourgeoisie states too.
I see some people claim that they're some paid Russian shills, which is wrong. They do it for free, with a genuine belief because that's what their community says and does.