One theory would be race. The US is all about race. Some of it probably has to do with white guilt (white Americans killed the natives, white Americans enslaved

One theory would be race. The US is all about race. Some of it probably has to do with white guilt (white Americans killed the natives, white Americans enslaved black people, white Americans heavily discriminated against black people, brown people and yellow people). Prior to paying attention to American culture I didn't understand that for Americans "latinos" are a race and all black-ish people are "black" and that "white" people are "Caucasian". Another would be that the US has barely any culture or history of its own. You can only go back a little more than two centuries if you want to talk about the US and only a little bit more than that if you want to talk about the Americas. Worse yet, the US is a nation of immigrants so most people's ancestry hasn't even been in the US that long.