Kent state saw 4 people unjustly killed. Tiananmen killed 100 to 1000x as many people and that’s just in the area with the reporters. The crackdowns in the other 300 cities without cameras were almost certainly much more brutal.

Going further, discussion about Kent state won’t get you in any trouble in the US, but discussing Tiananmen in China will get a far different response from the government.

Comparing the two only highlights just how much more extreme and repressive the Chinese system is despite all the US moves toward authoritarianism.