I've read about killings before, I lived through 9/11, but for some reason these killings struck me really hard. Even more than school shootings. Perhaps because I think of the cinema as sanctuary - a place of make believe where we go to escape (move over places of worship!) but mostly because I wanted to really know motivations - why did he do it? Especially when it turns out he's not a person who tortured animals as a kid etc etc. I want to know why a seemingly normal person can meticulously plan such a senseless act of destruction.
Why is there a need to find out why? Killing spree is a lot like thunderbolt. It has no prediction why it struck, in the path it stuck.
If you only want to minimize risks of future murders, then don't read/watch the news. Each time a murderer has his/her face shown, she/he is glorified in even tiniest of ways (i.e. comic book villain), with a number of murders he/she committed put in front line, number of violent copycat acts will spike.
It's completely incorrect to say there is no explanation why it struck. Maybe it's true that it was impossible to predict, maybe it's true that we will never find out the cause, but can be 100% sure there is a cause.
