Let's see if I can explain myself:
1. The incident is terrible. It's a pity, deeply sad, sorry. My condolences to the victims' parents and relatives.
2. I want to bring up a reflexion. Like old Pope John II asked, which kind of society are we living? A society that could in one century makes two world wars, create the power to autodestruction, fight and kill, do not protect the weak, the children, the poor, etc., couldn't we help with a little drop in the ocean and try to make the world better: maybe if we help to make better the people around us, we can contribute to the rest of the world. Talking seriously: I think the society has to find some answers and we must feel ourselves something 'guilty' to these things. Otherwise, life goes on, nobody changes nothing, thinks nothing... nothing is related to us, nothing has nothing to teach us. I'm not scared to think that I, myself, need to do something to avoid this sad things to happen. The guilty is not *only* the mad man.
It's my 0.02. Hope it does not bring fire to this thread and the avast forums.