The Day the '60s Died (2015)
grasshopper rex 3 points 8 months ago*. (Contains Spoilers)

Where are the songs and movies about the Orangeburg massacre or the Jackson State killings? Oh yeah, those were black kids. One need look no further than the Wiki pages of the 3 incidents to observe the stark difference in how little these two events impacted the national consciousness compared to Kent State. In particular, the cultural references.
EDIT: I’m not attacking you. Just making an observation. :)

Piglet 4 points 8 months ago. (Contains Spoilers)

You failed to mention the uprising at Wounded Knee in 1973. Of course there was one big difference, no lives were lost. But many other uprising from Native Americans did result in lives lost!
EDIT: I’m not attacking you either, just making an observation.