What culture? American culture, the one that is comprised almost entirely of immigrant experiences?

I never said America doesn't have a culture. I said that it is almost entirely informed by immigrant experiences, so the idea of shutting off new immigrant experiences makes no sense. You're just picking some arbitrary moment and saying "culture is done now". Culture is not and has never been some static constant throughout time. It's always changed, in few places more so than in America.

Not going to react to that because Poe's law applies here.