About the Marxist-Leninist -situation...

On certain instances here, there are tons of "tankies", which are a group composed of Chinese and Russian propagandists, their bots, and useful idiots, who do not realize they are hanging in the metaphorical nazi bar, and are falling for their rhetoric. Tankies are essentially authoritarians larping as leftists, and have nothing to do with communism, for example. They will tell you stuff, like Ukraine belongs to Russia (or has nazis, and needs liberating), and that China does not genocide its minorities (and that tibetans deserve to be "civilized"). Anything criticizing Russian and Chinese authoritarian regimes, is evil propaganda (by CIA, the USA, or "the West" in general) to them.
They do not argue in good faith, and giving them attention just allows them to get more visibility. They will try to bait people to write longer and longer rants, by multi-point arguments, that need tons of reading to disprove, or by insulting you/your country/etc., to derail the discussion, and to make you enraged and write those rants. The point is to exhaust you, to spread confusing info, and to make you seem bad, so that people will not believe you, but are more likely to believe them.

(For the context, I am from Finland, and my aim at fighting the propaganda is, to try to prevent people from supporting Russian imperialism, so that Russia might be able to change at some point, and stop attacking and invading their neighboring countries (so a personal motive), and to criticize Chinese government for committing attrocities. I feel sorry for all the Russian and Chinese people, who have to live under the oppression. Unless they support invading their neighbors and genociding, that is straight up evil.
I am also against the terrible things the USA is doing, mind you. Their propaganda machines just are not working very well here, since almost every lemmy user, seems to be against the USA government already.)