Kent state was the culmination of riots through out the country at Universities..Prior to Kent, these riots included setting buildings on fire, trashing the inside of building...The Berrigan Brothers (priest) went into recruiting offices and threw blood on all the records, there were political assassinations, JFK , RFK and a Governor and MLK. It was violent times and led mostly by radicals and communists/Marxist...with of course the useful idiots that followed them.....Today it is bad but a cake walk compared to what was going on then....The national guard were for the most part (called out many times) not given bullets Someone finally gave permission to stop these people and riots in any way needed....
The killings at Kent state actually put an end to years of violence...When the useful idiot students were shown that there are repercussions to their lawless takeover of many universities. Since they could get killed, it wasn't so much fun to be a revolutionary