There is no devil. There is only us and them, and them wants to kill us. Us would prefer to kill them first because, I personally can live with us but not with them, and like any organism, I want to live as long as I can. Death is not necessarily better than life, but as Ambrose Bierce pointed out, it is longer.
And what is this "we" bit? Are you assuming I'm on your side? That I still will be, regardless of what you choose as a course of action? "Personally", I can live with us minus those who want to nuke Mecca. And see precious little difference between those who want to nuke Mecca and those who nuked lower Manhattan. So, if you want to go to the head of my "prefer to kill them first" list, run around nuking cities.
Which is simply a single instance of the basic point, which I notice you managed to cut out of your selection from my previous. "But it isn't" - where power is to be found, that is. If you want to live as long as you can, avoid pissing off everyone who thinks as I do - we are a bit more numerous than Bin Laden's camp and decidedly stronger. Moral evil creates new enemies as fast as it dispatches the old ones. It is not a route to power, entirely pragmatically and even cynically, for that reason.