interesting, so by analogy just as as those disparate groups got subsumed into a larger one in some rough identity integration thing so too we would hope to further widen that group to join with other groups to subsume everything under the sun where group divisions are no longer even perceived. The whole "just one race" sort of thing I'm imagining.

I think that is probably the best outcome for the US, if it wants to remain as a unified state for a long time. If not, then separatism eventually leads to a divorce. It’s happened before in world history, it can certainly happen again.

Your example of European immigrants is noted but isn’t really relevant to the racial tensions between Blacks and Whites.