He's invincible, and he's reading how France, China, and Russia, will all veto anything that can hurt him.
He knows he's hidden everything except a drone and a few old chemical shells. Hans Blix is on his side. "Millions" of marchers are on his side.
Tom Daschle is on his side.
He ain't gonna step down from the best gig he's ever had, just because of a few words on a UN resolution.
If the Security Council members unite and vote for a second resolution that includes exile, then he no longer has France and Russia on his side trying to prevent his removal. More importantly, he will know that a failure by him to except the deal will bring about the termination of his gig.
The only thing that will prevent him from taking this deal is if he would still fear for his life in exile.