It is naive to think that people will change overnight. That's how we got here in the first place. Our civilization has been reduced to apathy and indifference, fuelled by an empty, though overwhelming rhetoric of love and compassion. It's too early to say what I will be doing. That's for sure.
Music is a powerful tool, and there's no point in being naive.
But I don't think you can blame music itself for bringing out the worst in someone. I guess you'll have to be in a pretty warped mental state to do something like that. I think that music is a very individual experience. We all hear the same sound I guess. But what you see when you listen to a certain piece of music, and the images and atmospheres it conveys are something that belong to you alone.