When has that happened via purely legal immigration?
Take a drive around the San Gabriel Valley. Or see how the influx of Northerners has transformed the South. Or consider that over a hundred years since the arrival of significant numbers from Italy we still have a problem with organized crime. This doesn’t mean there are no positives associated with immigration. I am certainly pleased to have Judge Alito on the Supreme Court, my 1/2 Italian grand daughter is the apple of my eye and my Chinese wife and 1/2 Chinese children are a delight. But our country is different now because of previous legal immigration. It is reasonable to assume that further immigration will bring further changes. We should contemplate what those changes might be.