I say this as someone who was born in the US and grew up there and will always think of myself as an American.
The US acts like the pigs in Animal Farm, everyone is equal but some are more equal then others. For example, nuclear weapons are bad and we can't let country x get them, but we will maintain our arsenal of thousands of nuclear weapons and in fact develop new ones.
Suddenly when the US is fighting a war against Islamic militants everything is allowed. Contrast Jenin and Falluja. In Jenin, Israel did not use heavy weapons out of consideration for civilians, yet what was the reaction of the US and the world? What is the US doing in Falluja?
After Abu Ghraib all I heard was how Abu Ghraib doesn't represent America. Now I am sure we will hear that the Marines who killed unarmed wounded Iraqis also don't represent America. So who does represent America?
People in the US think that the US is the model of democracy. In fact, the US has become a model for how not to run a democracy. Elections for the US have become a joke. Over 90% of elections for the House were not really contested because of gerrymandering. The Senate is not much better. We all know the problems with the electoral college.
The US is headed for a big fall, the budget and trade deficits are unsustainable, and the war in Iraq is draining away a lot of money. When it happens don't expect anyone around the world to be sympathetic.