An ideologically driven subset of urban educated youths that was proportionally a tiny subset of the entire Chinese population marched for it in 1989. FTFY.
They are ruling themselves in the sense that their governing systems are emergent consequences of their own cultures. All peoples ultimately deserve the governments they have.
That your point about support for Chinese democracy, could also be applied to Chinese communism - was that not obvious? Also in the Chase of Chinese communism the cult was facing a KMT that had suffered from just defeating the Japanese.
More of the point though they support for Chinese democracy was broad enough to the Beijing army could not be used to suppress the protests. The tanks and the people that killed the students had to come in from outside the city.
Try watching the videos instead of Fox News or OANN.
Pretti tried to help a woman who was pushed down by masked agents, they then attacked and executed him.
Good tried to turn AWAY from the man with the gun and get out of the situation and he stepped in front of her and executed her, shooting even after she'd driven past him without hitting him despite him putting himself into harms way.
The marched for it en masse in 1989?
Russians and Chinese are also people. They deserve to rule themselves.