BTW, who has used Chinatowns as proof of inability to assimilate? Thomas Sowell has used it as an example to the contrary.
Good point, I've argued not so much to limit immigration as I believe for multiple reasons immigration has been a good thing for America.. But instead increase the numbers of gropus that we know are assimilating well, and beyond assimilating just doing well in general.
The Indians, Japanese, Lebanese.. and probably Chinese all not only earn as much as American whites, but earn more. Which also of course means they are paying much more in taxes then they are receiving.
We also could use more professional young people from around the world, to fuel many of our high tech industries.