It's not ethnocentrism, it's real. Even from wealthy countries in East Asia where the strict Confucian relationships put huge burdens on women. Obviously, a lot if not most people are inured to those cultures and don't like the Euro/American level of cultural freedom. The ones who moved are the ones who couldn't deal with the oppression.
Ethnocentrism would imply racism, whereas our pluralism is one of the ways our culture is more free. Korea and Japan are wealthy, first-world liberal democracies, but they abhor immigration and remain 99% ethnically homogenous. The weakness of their cultures is (ironically) ethnocentrism. And even though Western Europe is much better, no place really matches America on this one.
