China is notionally both and what they’re doing in Xinjang is at least genocide adjacent. Russia justifies their war on Ukraine as a struggle against genocidal fascists and again, it really seems like they want to destroy Ukraine as a separate culture and people by assimilation and extermination.
Both countries are frequently defended by left wingers
Of course there are idiots who defend China or Russia and call themself left. That doesn’t mean that China or Russia are left. China has a weird form of state-capitalism and Russia is a facist oligarchy. They are not left, they are right extremists.
China is ruled by a communist party and position themselves as allies to left-wing governments around the world. They are clearly and explicitly left-wing.
Russia isn’t left-wing, but they use they are acting like fascist and committing genocide-adjacent acts in the name of anti-genocidal anti-fascism, the rhetoric that the original commenter parodied