The problem is that civilized people aren't real good at exterminating entire civilizations. It's in our nature to wait until they're close enough to kill us before we'll really do anything about it.
I can't image the horror the West will have to endure before we bring ourselves to do what's necessary.
Rome put up with quite a bit from Carthage before finally deciding they'd had enough of Carthage. Do not assume the attitude is buried too deep for it to surface again.