Oh, absolutely. I think it’s a combination of
tldr; one) slavery, Native American genocide, structural racism, the civil war, and McCarthyism; two) manifest destiny; and three) Reagan
the country literally being founded on and steeped in multiple deeply societally divisive, violent, and genocidal institutions, the cultural worship of rugged individualism, and the simultaneous erosion of public education and removal of the fairness doctrine, which, in combination with the heavy usage of and government investment into propaganda since the 1930s (along with other factors, like the fact that we’re a huge country with only three land borders with two countries, neither of which historically had a radically different culture immediately upon crossing the border [the four countries that border Mexico used to be part of it, and before cultural homogenization, the American border towns weren’t so far off from their Mexican equivalents], so, given the high cost of international compared to domestic travel, most people (that’s just a population index for comparison with the next link, if you want) don’t really go anywhere too much different from where they are from, even fewer before air travel became commonplace, so for boomers and older)]) lead to a very malleable society
, but that’s just one of many perspectives on why Americans are so docile in the face of such circumstances.