Why wouldn't the ANC's justification for taking property from whites also not be valid in the United States? Why would non-whites in the United States not do something similar if they were an absolute majority of the electorate?
Because the culture, politics, and history of the U.S. are vastly different than SA. Plus, we don't have "ethnic" parties here.
I thought in some states whites voted 90%+ republican and blacks 90%+ democrat?
I think that does qualify as "ethnic" parties at least at the state level.
Alabama 2012
White : 84-15 Romney
Black: 95-4 Obama
Missisippi
White 89-10 Romney
Black 96-4 Obama
(couldn't find numbers for Alabama or Mississippi in 2016)
Racial polarization is terrible in the Deep South. But let's not forget that there are a lot of states where whites are less than 55% R. And I just don't see what kind of coalition could unite deeply religious whites, populist whites, generic conservative whites and urban moderate/liberal whites unless there literally is a race war.