If you haven't been there you can't understand.
Seriously. This isn't teenage nihilistic bllshit here. I'm not some 13 year old goth kid who feels hurt by the world. I'm a successful 22, almost 23 year old man. I do see error in their methods ut not in their motives. BEing ridiculed and beaten when there is nothing you can do about it. Being the only thinking island in a sea of upper middle class white machines. Being "the friend" while any girl you are interested in is periodically date raped by the guy she "loves". How wold you suggest they strike back? Tell the principle or teachers who adore these burly white primates? Yo try and get an establishment to reprimand the exact things it tries to create and see how far you get. They had no way to fight back but what they did. They had no outlet but violence. They are only a few grades worse than the people they shot. This animation doesn't glorify them, it shows it from their perspective. They weren't monsters, they weren't heroes. They were betrayed by a system that was supposed to help them and by peole they should have been able to count on.