a video of a tank flattening a protester who stood in their way

Is he talking about “Tank Man” from the famous photograph? That guy was never run over or “flattened” and there are videos of the incident showing him talking to the guy operating the tank and going on his way.

There’s a report of 11 people being crushed outside of the square (Liubukou) while running away. There is not video of this.

nationwide unrest across China which resulted in millions of deaths as the CCP used military directly on its own citizens

Millions did not die either, that’s an especially bold claim. The actual protest caused somewhere from hundreds to one thousand deaths and thousands of wounded. The unrest afterwards does not have a death toll that I can find, Wikipedia only mentions people dying by train.

Also the term “tankies” does not come from that incident. It comes from those who defend the Soviet use of tanks to suppress the Hungarian Revolution of 1956.

Their main choice of weapon is pretending to be promoters of communism, anarchism, and liberation of minorities standing against the evil corruption of capitalism

The rest just seems like an unhinged rant against leftists, all disguised as hating tankies. The racist part is bolded by me. There’s very little truth in what you quoted.

This poster has a lot of takes I disagree with, that’s all I will comment on about their post history.