Oh shut the fuck up, liberal.
TSM was a failed color revolution spearheaded by capitalist academics who convinced students to literally murder and burn alive PLA officers. Nobody was killed in Tiananmen Square. Protestors were killed outside the square after they continually attacked the PLA.
It is a blemish on China not because the crackdown was unusual or unwarranted, but because it got out of control and the world needed something, anything, to use as propaganda against a nation that refused to do imperialism. A nation that would eventually surpass the USA in strength and relevance.
To invoke the TSM as propaganda is to admit you're afraid of China. And you should be, if you're a western liberal. Which you are.
Fucking hell.