[seanmcdirmid]

You are free to talk about Kent state, it is covered in a lot of documentaries. There is even a monument at Kent State about it (as opposed to the “nothing happened here 6/4/89” plaque at Tiananmen Square). It isn’t taught in HS history class for the sake reason that Vietnam war is not taught (there is simply too much history and not enough time to cover it all).

A reasonable comparison might be Black Wall Street, but even then discussion about the event isn’t suppressed, just at the time the event was covered up by the local government of the area. But the CCP doesn’t remember the Siege of Changchun either.