Albert Einstein and Enrico Fermi fled an unfriendly situation in Europe and landing here did us a lot of good .
After WWII even more technical and scientific experts left Europe seeking prosperity building and teaching in the US , enough that there were a lot of complaints of "brain drain" in Europe.
If what we are getting from Asia includes some of the best talent and education , we should be happy about that, should we apply an IQ test to the illegal immigrants and exempt the top twenty percent from being deported?