Give civis that warning first. Then the leathernecks have easier kill-or-not decisions, easier to lean toward "kill."
Here's what will happen, we will kill some, then they will all run into mosques.
Ends there.
Unless our leaders grow some serious balls. Then we'll blow the mosques to hell, which to me, is even better than killing some insurgents. That'll bring even more nutjobs into Iraq to try and kill the troops. We'll kill them too.
We just need to kill enough that the muslim population of young men is decimated so much that only the arab christian men are left.