After all:
- we have WMDs
- we're the only country to use nuclear bombs against an enemy
- we've been saber rattling about N. Korea, talking diplomacy, and if it fails, our military is going in (to paraphrase Rumsfeld)
- we attacked Iraq in a pre-emptive strike to prevent his using WMDs, so why can't they make the same argument on us?
- getting rid of the current administration would be good for the country and the world (same reasoning to remove Saddam)
- we've proved our unwillingness to respect other country's governments; see our takeovers in Grenada, Nicaragua, Chile, Iran, etc. etc. etc.