So there’s two cultures one that embodies everything you don’t like and one that embodies everything you do like. Convenient. Maybe you should have led with that obtuse distinction.
So some portion of foreigners are stuck in their culture and some are not. We can guess what your estimations of the percentage is, but if you know that it’s not universal then what were you trying to say with the whole Chinese will never be European and Indians will never be German?
Are you aware of the history of state sponsored schools designed to erase cultural identity like you praise? It’s a pretty disgusting path you are skipping down.