Letting the rest of the world destroy itself is exactly what I want it to do. If one "may" sell oneself for war than one "may" sell oneself for sex. Pot? Don't like it? Don't smoke it.
The more freedom the better.
I wouldn't lift a finger to keep Iran from getting the bomb. There's no way to stop it short of war. Why? The laws of physics are the same everywhere and everywhen for everyone and everything. Uranium is plentiful. So if we may, so may they.
Nor do I feel myself obliged to care a rap about Israel any more than about Greenland.