Assimilation: In anthropology and sociology, the process whereby individuals or groups of differing ethnic heritage are absorbed into the dominant culture of a society. The process of assimilating involves taking on the traits of the dominant culture to such a degree that the assimilating group becomes socially indistinguishable from other members of the society.
The core values of many of the world's cultures are fundamentally at odds, especially among the less educated.
I actually supported immigration of the well educated from any culture/country. To a degree they are already somewhat assimilated to the modern (ie., Western) world.
I also don't know what you mean by distinguishing "native borns." Many of our country's most ardent "Americans" were immigrants or children of immigrants..
This is especially true in the scientific and high-tech communities.