I always hear this all the time from non white people in america, but as a minority, I’ve almost never had this. I think generally speaking the new world of the America’s takes in alot more immigrants than anywhere else in the world and its easier to assimilate here compared to most of the old world that already have long standing rigid structures. However I’d say who is “american” is constantly expanding over time and always has been since the inception of the the country. There has always been the in group (whose been there for over a generation) and the out-group (immigrants who are 1st generation). I know you probably don’t see this. But even if you were a brown latino person, if you traveled to Europe (say france) and met a white american, that racial divide back home suddenly breaks down cuz suddenly YOU (the brown latino person back home), and the white american have more in common with each other and can communicate with each other than the white french person, who cant communicate with either of you, despite them and the white american both looking more similar. Crazy right? The same is true when I’m in asia, even though I’m physically asian looking, I can’t communicate with those asian people in asia due to language divide while I can with an American of a different race.