Whether the man had mental problems or not is irrelevant. If you have mental issues that are pushing you towards actually carrying out violent acts, you need to seek help. If you are incapable of seeking help on your own, family, friends, co-workers, neighbors, and anyone else who knows you and knows you are having serious violence/mental health issues has a responsibility to see that you get help, so you don't hurt anyone, including yourself.
However, society in general is not responsible for a violent person's outbursts. The one most responsible is the one who has the violent outbursts. After all if you can't handle booze, don't drink. If you can't handle your violent emotions and urges on your own get help. DUH!! !
I am part of society--granted, as an Aspie misfit, but still part of society. I bear no responsibility for what this monster did. I did not know him, I never did anything to him, I didn't give him any weapons or ammo, and I didn't urge him on to kill people. So, don't go dumping his monstrous actions on society!
I am qualified to make these comments. I was bullied and tormented mercilessly as a child. I wished my tormentors were dead, or hurt, but there is a big difference between wishing such a thing, and actually seriously wanting to carry out those wishes. Even back then, what I wanted most was that my tormentors would be punished, so that I would have justice, and that they would never torment me again, and that they be far away, if necessary to prevent them from tormenting me any more. The fact that I wanted justice over them being dead is proof enough to me that I am not a psycho or a sociopath.
There is no excuse for what this monster did! He was not defending himself, he was on a sick hunting trip--and innocent people were his prey! 