Re: Should this Superman kill? - Part 1
Killing isn't a exclusively human trait. It's a trait of many different species, including some kryptonians as well as numerous other alien races.
Superman doesn't kill, not because he's better than humans, because he's some kind of God or because Kryptonians are instinctively a better race, but because he's as good as a human can be, and he has the means (superpowers + intelligence) not to have to kill.
Superman: Don't be afraid.
Lois: I'm not. Helicopters, danger, go, go, go! Then we'll talk.