How does one feel that he is being humane when he refuses to torture his enemy?
How does he know that the enemy is not torturing one of his friends?
On the scales of justice torture should be traded for torture or you are being a traitor to your own side.
If your enemy tortures your friend then you have a fraternal obligation to kill your enemy.
Why do Americans pretend that goodness is a failure to extract killing?
A failure to water board is a failure to live up to your responsibility of punishment. You have a moral obligation to hurt your opponent.