Too many rules. What is the big deal ? I lived in a city of 80,000 near San Jose that was fully integrated like most of the Bay Area. Minority white, black, Asia, India, etc. Many marriages were interracial. At our High School graduations, the children are every shade of skin color you can imagine. Nobody ever thought that there were rules to interact with the another race or nationality. You even got used to the ESL's (English Second Language) murdering English.
I hope America gets to a point where nobody cares about race or nationality.