Most of you are making a big mistake: you assume too much.
The truth is, we don't know what will happen. There are many different possibilities, and not much that we can be sure of.
Maybe the US will win easily. Their technological advantage indeed makes that very likely. But maybe they won't. When preparing for the war, the US military did a large scale simulation. In that simulation, the US had major losses, no real gains, and they would have lost, had it not been for the head of the military disallowing the side playing "Iraq" to do anything not known beforehand.
Read about it here:
http://www.guardian.co.uk/g2/story/0...786992,00.html
I personally think it would be foolish to make any assumptions based on the limited information we have.