Humane murder.

Humane a. benevolent, compassionate, merciful; (of learning) tending to civilize; .... OED

Tending to civilize??? In the human invention of war, is it possible to murder humanely? Then again, it isn't murder during war, is it? It's just killing. Does an atom bomb kill humanely? Can anyone kill humanely?

The Oxford English Dictionary has it right. Humans aren't civilized (by extrapolation): we only have a tendency to be civilized.