I'm not sure, but I think WenomousVit is referring to the American Dream, the idea that everyone could become rich and successful if they just work hard (thereby implying that those who aren't rich/successful should blame theirselves). Another thing is that American children are indoctrinated with patriotism and nationalism, which - maybe surprisingly to Americans - are two rather dirty words in other countries - at least in Holland, where I live. Then there's a more implicit message in "One Nation Under God" (the national motto) that faith/religion (especially Christian) is the norm and all else is Unamerican.

But again, I don't live there, so it's hard to judge for me as well.