America has a case for ignoring the opinions of others if and only if it is better informed. If it is not, then it is in no position to ridicule the rest of the world.
And that is the difference. It is not that anyone else's opinion is better informed or not (that is truly immaterial). We dont care, because they do not matter. When they get to be top dog, then we can care.
You dont emulate a bum to get to be CEO of a company. "Europe" (the rest of the world to the enlightened literati of America and to Europeans themselves, including their vassal states) has had over a thousand years to do someting other than beat each other up. America has had barely 200. So who are you going to listen to for investment Advice - Ken Lay? Or Warren Buffet?