The U.S. is a color coded nation. Ethnic distinction is based primarily on race (color). In earlier American history, there was more relevance to ethnicity, but today Europeans have become so integrated that we're all simply "White".
You don't really seem to have much of a grasp of American society and culture.
Why would that be?
I'm asking this thinking that you may be assuming that I don't know about ethnic pride, ethnic food festivals, ethnic clubs, ethnic neighborhoods, etc.
But I'll let you answer, and then I can give the reason for my comment.