In a war, you take prisoners; you do this so the enemy will in turn treat your soldiers humanely.
Does ANYone anywhere think those terrorist scum would treat one of our men "humanely"?
Or even humanly?
You don't take prisoners when, for example, you're fumigating to rid your house of cockroaches...
Right you treat soldiers humanely. These guys are not soldiers. They have been hiding out in places of worship, taking hostages and beheading them. They are outsiders and they deserve no respect.