I just read this article by John Derbyshire that I recommend reading in full. It contained the following that I have adapted slightly:
Some people believe that the only people with any right to be in America are the American Indians. If true, this suggests two possible courses of action: (1) Non-Native Americans should all leave the U.S.A. (2) Non-Native Americans should learn an obvious lesson from the experience of the Native Americans: If you let masses of foreigners flood into your country for long enough, it will eventually become their country.
If everybody was forced to go back to their ancestral lands when the music stops, then white Australians and Canadians would have to head back to Europe. Jews would have to go…where, exactly? Back to the Middle East to be slaughtered by Muslims? Crammed into that tiny piece of land called Israel? Of course, finally having all Jews in one place would certainly make a nuclear-equipped anti-Semite’s job of wiping all Jews off the face of the earth a lot easier. Or maybe Ashenazi Jews should go back to Central and Eastern Europe where they could once again savour Slavic and Teutonic hospitality?
Indians and Pakistanis would all have to return home, as would the Lebanese of Australia. All black people would have to return to Africa, other than those who are the descendants of slaves. They could stay in the USA because they were taken to America against their will and can therefore be excused of everything until the end of time. Hispanics could also stay in the Americas because they are partly descended from Native Americans (hooray!) and partly from Spanish colonialists (boo!). Arabs would all go back to the Arabian Peninsula and would have to promise not to invade Christian lands again. The descendants of Anglo-Saxons would go back to Denmark and Germany. Those of mixed race? God knows. After all, all of us are from Africa if you go back far enough so maybe we should all go back there.
If everybody went back to their ancestral lands then there would be some very crowded countries and whole continents with almost no one in them. Australia would be virtually uninhabited, populated only by a few drunken aborigines. And if all whites and Asians left America leaving only Amerindians, black Americans and Hispanics to their own devices, who would finance the various welfare programs that these groups live off? After all, 25% of black Americans are on food stamps. So would America then turn into another Africa or Mexico if it were populated by Africans and Mexicans? I don’t see any reason why not. After a while we would see blacks and Mexicans paddling to Europe in the hope of guilt-tripping the white populations into subsidizing their dysfunctional lifestyles.
Anyway, After reading this article by a member of the Comanche Tribe, I doubt that getting rid of whitey from America would solve any problems for the minorities and would almost certainly make things worse.
Here’s a classic article by Garret Hardin from 1974, the final third of which deals with this issue.