You know what other country​ has heaps of immigrants? Australia. I'm Australian (English ancestry). My neighbour is Australian (Italian ancestry). My best friend from high school is Australian (Chinese ancestry). My coworker is Irish (as in a citizen of Ireland), but her two daughters? Australians. Doesn't that bring more of a sense of unity, a shared country, a shared identity, than classifying each other based on where your great-grandparents came from?