They become foreigners in their own town. The kid from Oaxaca ends up making pizzas in Santa Monica. California slang, the thump of rap. There is no resisting it. Assimilation is more a biological process than a matter of choice.
Immigrants end up walking like the native-born, assuming the same nervous slouch.
The religions of the world that are growing are those that address the sadness of the migrating poor and their longing for the lost village. Papa grumbles that the kids are becoming disrespectful U.S. teenagers. America is a most remarkable country, the model of modernity. The Mexican kid from Oaxaca will not go back. His dollars and maybe something more he cannot describe will keep him making pizzas in Santa Monica.