What people fear most about tragedy is its randomness - a taxi cab jumps the curb and hits a pedestrian a gun misfires and kills a bystander. Better to have some rational cause and effect between incident and injury. And if cause and effect aren't possible better that there at least be some reward for all the suffering.

I think violence cynicism brutality and fashion are the staples of our diet. I think in the grand history of story-telling going back to people sitting around fires the dark side of human nature has always been very important. Movies are part of that tradition.