Asian Americans lump together homeland countries of over half the world’s population.
The waves of immigration also look different demographically; the people who came over to build the railroads and staff laundromats, restaurants and nail salons are very different from the tech worker on H1B. (And the latter often look down on the former.)
Then again, I've noticed that the ones with money are utterly alien to those of us that don't have it or grew up without it.