Immigration and quick assimilation are both very american. America is a settler nation, we define ourselves by where we came from, and are proud about it. The second generation of immigrants growing up in america will have little to relate to from their parents culture and will be more aligned with american values. I have an immense number of friends who's parents are not from america and when they visit their country of origin they are like a fish out of water, unable to relate. So yes, a black guy from boston, the son of a mexican immigrant, and a redneck from florida are more alike than you or they realize. It's when americans meet other americans while travelling outside the US that this becomes very apparent.