We won't even enter a rogue city with ground troops.
I don't think nukes are anywhere in the picture for the U.S.
I think we've set a pretty high bar for "civilized" warfare, at least compared to all other wars in history. Whether fighting a "sensitive" war actually works as well as defeating your enemy remains to be seen. Good news is we still have quite a bit of support in Iraq, a lot more than we might have had if we'd flattened mosques and cities. Bad news is we aren't getting the bad guys as fast as we need to.
I know what the plan is. The Pentagon has spelled it out. The plan is to have the Iraqis clean up their own mess when they're ready. Politically, this is a great idea. Practically, I'm not sure about it at all.
