It is more misleading to count somebody as different who is second or third generation American and who has fully adapted American culture values and norms but count that person as more different to the host country due to different skin color or remote country of origin than a Spanish person whom just settled in Switzerland.

The slightly racist assumption in America is that if I as a white Norwegian settle in America I contribute less to diversity than a black American who has lived his whole life in America.

In America diversity is all about what you see on the outside.