Evil takes many forms, and no less evil is that which diminishes our God given ability to resist evil.
You would think that there must be some decision point where these people decide to quit teetering on the brink of mayhem and ultimate self-destruction and act on their urges to kill. Do chemicals cloud their judgement, whether they came from a pharmacy, were absorbed in the workplace, or something in the water?
There are numerous drugs which act to diminish or incapacitate human judgement, from the commonplace such as alcohol to far more exotic substances such as Ecstacy and LSD.
Even the 'date rape drug' has been known to assist those with evil intent in perpetrating their dastardly deeds on others.
No, the substance itself may not be the root of the evil, just a contributing factor.
In this case, and in other cases of mayhem, it bears examination.
True.
My evaluation; he was a loser as a kid and grew up a psycho hating himself and therefor turned it around by killing others and himself.
People like this nut job are notorious for killing sprees just to get the attention they feel they never had.