I forget what the concept is called, but I will call it something like emigrant conservatism, where emigrants bring essentially a snapshot of their culture from

I forget what the concept is called, but I will call it something like emigrant conservatism, where emigrants bring essentially a snapshot of their culture from when they emigrate, and that snapshot remains fixed - they don't feel American, so they don't integrate into American cultural norms, and they don't have much active interaction with their previous home's culture which is constantly progressing.