It’s true — we can’t! We non-muslim nations can hardly coexist without making war on each other, trying to get over on each other, and trying to take each other’s stuff. Yet by and large we (those nations) formally reject doing so as social, political, and diplomatic dogma!
How in the world could we expect to coexist with people and nations who tell us to our faces that they intend to rob, rape, enslave, and kill us, and that they believe that in so doing, they are obeying the divine will of their beloved deity, who has commanded that they not rest until they have done so to every last human on the planet?
But then, who is worse? A monster? Those who stand aside, and let him run wild? Or those who, knowing what he is, fund his rise, and profit from his monstrousness?