Mass murderers act like aspiring celebrities because that's what they are. They want to be famous. They are compulsive narcissists who need everyone to pay attention to them.Analyzing their manifestos for motive is a waste of time. Rodger, like Dorner, Breivik and Bin Laden, was obsessed with power fantasies. They all killed people to gain power over them and over the larger audience beyond their victims. They wanted to make the rest of the world see them the way they saw themselves. Their videos and manifestos were a pose like everything else about them.A hundred years ago we would have called them evil. Today we pore over their writings trying to understand what made them snap. And when we do that, we make the mistake of assuming that their complaints made them kill, instead of being the excuse that allowed them to kill.