The clustering is the problem. It allows foreign cultures to take root and reproduce in the U.S. And there's nothing "racist" about it. Culture is not superficial, like skin color. Culture drives differences in how people participate in government, civic society, etc. E.g. if you're in a little Vermont town and a bunch of Alabamans move in and start changing the culture, it's not "racist" for you to oppose that migration. The same is true if you're in any place that's has a more successful culture that's seeing immigration from places that have less successful cultures.
> Older adults who come here are likely to be slower in assimilation of language and culture, but their children very much grow up as "americans".
That wasn't true even for the European immigrants. If you define "American" as orderly, austere New Englanders, the Ellis Island immigrants never became fully American.
Even generations later, people's cultural backgrounds affect their attitudes: https://www.rorotoko.com/micro-interviews/20230913-jones-gar....
