And let me repeat, racially and culturally homogeneous societies are no utopias. Not by a long shot. I am not imagining some Caucasian Kumbaya. History makes this superabundantly clear. WWI is just a single example. But it's a choice between the tragic limits of human life vs catastrophic apocalypse (acute or chronic.)
The basic culture of American Whites is northern European and the basic culture of Blacks in America is west African. Who in their right mind would ever think that these two utterly different groups could live together amicably, in a state of --as the lying phrase goes-- "racial reconciliation?"
Today's crazy idea is tomorrow's Law of the Land. Check this out.
In the end, there can be only one.