A sleeping 16 year old shepherd boy guarding the yard outside of the building of his leader, who you need to snatch, for interrogation.
You should be training our Special operations people, you could explain to them that slitting the throat of a sleeping sentry isn't necessary, that you could just wrestle him down, break his arm, and carry him with you, until you can enter the enemy's headquarters and place him a locked room.
You don't seem to have any grasp of what the military has to do, it gets far worse than killing a sleeping sentry, you must not know that soldiers sometimes have to execute all of the enemy wounded, and in a worse case scenario, kill one of their own who is injured and can't travel, or even a young child who has seen them deep behind enemy lines.
If you think that is bad, then you sure don't want to contemplate bombings and artillery and Armor use, in city fighting.
Do you know how our soldiers cleared a house in WWII, not knowing if it was empty, or occupied by a family, or by enemy?
Ether we go passive and stop resisting, and surrender, or else we have to do things that you evidently, were not aware of.
This is a game I will not play. I'm off to the beanpatch. You may want to bolster your hypotheticals with the crucial details needed to make a judgment --- and then offer them elsewhere.