Been there, done that...
There are many instances where the Feds/States have used Military forces to"quell" "insurrection"...
Most of them are in the early years of the Republic but it happens and its totally against the Constitution but hey When you are the guys in charge you tend to do what you damn well please if you think you can get away with it. And when the Media is running interference for the guys in charge there is little hope of stopping them.
I dare to say that the Kent State pictures to evoke sympathy are very wrong. The punks virtually burned the city the previous day and were that short of assault on the soldiers. I have always felt that they didn’t shoot enough of the bastards.
Sorry, but I have no sympathy for the deadbeats who attacked a city and then attacked the military. Those soldiers did what they had to do . . . defend themselves.