US Marines have a manual too, and are very decided on the legitimacy of killing murderous al-Qaeda operatives.
"...It's time we recognized the nature of the conflict. It's total war and we are all involved. Nobody on our side is exempted because of age, gender, or handicap. The Islamofacists have stolen childhood from the world." [FReeper Retief]
"...That the totalitarian force pitted against freedom wears a religious makes this civil war among mankind all the more difficult to engage. Loving freedom as we do, it seems reprehensible to deliberate against a religion. But this is no ordinary religion as it demands absolute obedience of all to their religion at the cost of freedom itself." [FReeper Backtothestreets]
Words fail me.