They might as well bomb the hell out of Iraq.
If they're intent on fucking the country over completely then they might as well go ahead and finish what they've started.

If they get rid of Saddam Hussein they'll probably repace him with a thoroughly brutal dictator with utter contempt for human rights and democracy, but he could hardly be worse than Saddam himself.

Anything has got to be an improvement. If the USA gets its way with Iraq then we'll finally see those genocidal sanctions lifted and hopefully then Iraq can have a new start. - Albeit as a client state of the USA but that could hardly be worse than the deal the Iraq people have now.

Why not let America win? Let it take over the world. If America gets to own every country in the world, then at least it'll be able to enforce (in its own self interests obviously) some sort of Pax Americana. No more wars would certainly be a welcome development. And then all the people of the world can carry on fighting for their rights within the American empire - they'd have to have at least as good a chance as if they were still fighting within their own corrupt dictatorships.