Warlike religions reform when they learn that war does not avail. A complete and utter defeat of the Islamists is, paradoxically the kindest thing we can do for the Muslims, as well as a necessity for our own preservation.
There would still be the problem of the Koran --- it directly commands them to kill all Jews and Christians and force the world into submission to them --- the Arabs and follow the ways of the pedophile thug rapist named Mohammed who murdered many innocent people himself.
Islam can go the way of previous religions like those of Moloch and Baal and the Aztecs'. Not all religions have to survive --- some cannot change enough to be worthwhile having around.