Anarchist Memes

The Mongols ruled China during the Yuan Dynasty. The Manchu ruled China during the Qing Dynasty

The Manchu people also known as the Jurchens, are descendents of the mongol and Turks.

Xianbei and Xiongnu ruled parts of China for periods

Yes.... Which were both tribes of steppe people from the eastern han dynasty, which is what I claimed in my post.

the Warring States

The Qin dynasty is a bit more complicated as it was multi ethnic, but was originally founded by people who would one day consider themselves Manchu. But this is prior to the han dynasty and really before conflict in the area stratified into mostly ethnic based conflicts.

Taiping Rebellion

I already covered the Taiping rebellion in a separate reply.

China is drastically more complicated than our eurocentric perspective suggests

Lol, I'm Korean, a descendent of the Manchu people.

I think the problem you are having is that in Europe transitioned away from classical imperialism much sooner than Eastern Asia. So most you tend to have a hard time separating nationality with ethnicity, as that is typically how you guys divided empire into nation states

So when you use vernacular like mongol, you don't realize that it's interchangeable with things like steppe people, Manchu, or Jurchen depending on what era or dynasty you are talking about.