> History and data from various European nations suggest that some immigrant groups aren't able to integrate with the host society after multiple generations...

I wish we as a society could focus on people, not ethnic groups.

Deport people who can't assimilate, keep those who can. Figure out more accurate ways to determine who is who then skin color (or even things like personal taste).

Some stereotypes are backed by statistics, but there's a reason why all stereotypes are bad.