Oh yeah, even the Chinese LLMs are pretty lib because the most of the internet (especially the English part) is dominated by liberal content, and the model makers (the Chinese ones, I mean) optimise them for coding or math performance without caring much about ideology.

There is definitely an opportunity for someone to fine-tune it with Marxist content, but the prerequisite for this is to build large enough datasets with the right information and analysis. This is why stuff like Prolewiki is so important.