Do you know what St. Patrick's Day is? Ever seen it mentioned in the USA? Is it a "thing" anywhere in the USA?
That's Irish culture, that's become US culture. Because culture isn't a static "thing", and it isn't overarching; it's made up of the collective impetus of everyone's personal observations. And it's always changing.
Same happens with everything. It'll happen even if you locked down the borders completely. Culture is never static.
If they're American, then their culture is American culture. That's what you keep denying, and you're straight-up wrong. You're attempting to argue that they aren't "real" Americans, culturally, despite them objectively being "real Americans".Hispanics holding Mexican culture, Iranians holding Persian culture, or Germans holding German culture are not holding AMERICAN culture, even when they hold AMERICAN citizenship.
If you're going to admit that they're Americans, you have no business claiming that their culture isn't American, because you've just admitted that it is.I haven't argued once that they're "not really Americans".
I've stated - CLEARLY - several times that they're ENTIRELY "really Americans".
What I've said is that they often hold a different CULTURE, and do so for the first few generations after the initial familial immigration event, before eventually assimilating into the American culture, with each subsequent generation adopting more of it to a point (the individual family line varies in this due to being individuals as well as coming from backgrounds that make them more or less quick in doing so.)
I'm not arguing, nor have I once, that they're not really American.
Cultures DO change, significantly, in very short periods of time. Look at North American culture in the 1980s. Wildly different from today, even though that's just 30 years ago. No Internet. Computers are just becoming a widespread "thing". Music is completely different. Clothing trends are wildly different. Cell phones are an oddity.And your definition of what makes a culture isn't just arbitrary (as you accuse mine of being), it's just WRONG. A culture isn't just a collection of the points of view of what people are citizens of it at any given time. Were that true, cultures would change much more than they do and no culture would have static views, yet both of these have been seen to be the case.
The only way a culture remains static is if it avoids even exposure to other cultures, while at the same time aggressively enforcing a traditionalist worldview internally. It's a narrow slice of the human pie that would even fit that bill. North Korea, for instance, but not, say, Iran.
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And this'll be true even in different parts of the same city, particularly in cities like New York.
There is no such thing as cultural homogeneity, outside of radically authoritarian and isolationist states, and pretty much the only one that pops into mind is the DPRK, currently. It's just a wildly incorrect view of human sociology.