[Justin@Athens]

The Nordic states have done a fairly decent job in recognizing that their nation's cultural identities are very susceptible to delusion from outside influence. They have very restrictive immigration controls to help them protect the idea of what their countries look like. (for better/worse economically)
They also have policies to insure immigrants adopt the language and find work. It is not just who you let in, it is also how inclusionary they are in the host society.

Multiculturalism, is what is practiced in Europe--and it is a bad idea. When you move to a state, you need assimilate the cultural practices and societal norms of the host nation. You can't really force people to do these things, they need to be incentivized. The truth is we need immigrants--a lot of them, and all kinds, from all different social strata and educational backgrounds. What we need to improve is the process by which they become American and adopt that identity, not just its privileges.