Anyone who thinks Batman doesn't kill should take a look at some of the early comicbooks. In his very first appearance, I think, he doesn't even think twice about snapping someone's neck with a kick to the throat, because fuck civil liberties and due process. Yay for the good guys!
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'