The truth is the lefties staged this whole thing hoping the guard would shoot, this was the ideal situation as far as they were concerned. Communists were running rampant at the time and using idealistic young idiots to help them in their cause of stopping a war against a communist nation. Among the active communist, of course, was John Frikin' Kerry and his ilk. ("You know what an ilk is don't you? Yeah, its a big deer." First prize to anyone who identifies the movie that was taken from).
The 60s were a bad time and the main reason we are in such trouble now is because the majority of the people, me included, didn't take these revolutionists for the communist party seriously. We need to do that now and fight back as hard as we can.
Some people may have deserved to get arrested but when the shooting started the nearest person shot was about 60 feet away, the nearest student killed was 100 feet away and the rest were 100 yards or more away. At least 2 people killed had nothing at all to do with the demonstrations, they were just walking to or from class. The CO of the unit was brave to the point of insanity, he walked right in front of the soldiers as they were firing screaming for them to stop. The incidents that led up to the shootings may have been the catalyst but it's hard to explain how the actual shooting was justified.
The above statement jarred my memory: A while back I read a book re: the Paris communard of 1871, before,during, and after. It seems the revolutionaries felt that in order to give a rallying point to their followers, and garnish sympathy from the general population, they needed a martyr to/for their cause.
So with every encounter the communards became more and more "Kent state" with the till finally it works. The guards fired, killing one of the useful idiots. The revolutionaries had their martyr and played it for all it was worth, i.e. elaborate, almost theatrical, funeral; huge memorial, protests, pamphlets, rallies, etc. etc..
I guess it's like Mark Twain said, "Only Adam ever saw something for the first time."