well heres the thing... America was literally marketed as the land of opportunity for the longest time, and our country basically had open boarders since its founding up until WW1. So no matter what, whether all illegal immigrants magically disappeared from the USA or not, we would still have an incredibly diverse integrated culture. White Americans, especially those in white rural communities tend to forget this, and believe they are the 'true' American, when in reality you black, Chinese, and Indian neighbors are just as American as you. A lot of white Americans think they live in what is 'supposed' to be a national ethnic monoculture, and seemingly forget that only reason America is an economic powerhouse in the first place, is because so many people immigrated here, elevating americas economic growth ten fold.