What are we?

We are a society that takes the depravity of its enemies as a reason to stop making them mad. If they Nazi's had reacted to occupation by going around and randomly killling passersby in markets and blowing up churches on Sunday would that have caused us to question our conquest of them? And yet when the Islamic Facists reach ever greater depths of depravity we take it as evidence that we should never have taken the country from thier control in the first place.