Fair question. Impossible to hold the moral high ground if you join in with the barbarity of the Barbarians.
I will happily settle for just the "High Ground" as militarily that is the objective and is far easier to defend.
If you hold the High Ground
you decide what is "moral".
This isn't Bean Bag we are playing at here......this is real life and survival of our way of life and belief structure if you care to check it.
We have real enemies out there that seek our destruction.....like it or not we have to confront that enemy. If it means using violence then that is how it goes. So far....polite talk hasn't seemed to win them over to reason and logic.
I will bet somewhere in the wonderful Quran there is a passage that says something about living by the sword and all that....knowing what a peaceful and contemplative religion Islam really is.