What region of the country has blacks most out of the mainstream? I'd guess its the midwest, especially Michigan, Ohio, and Indiana. I read somewhere that 20%?! of blacks in Cincinnati were Republicans?
In any case to answer the question I think a lot of it has to do with OLDER white southerners being way out of the mainstream thereby skewing the results quite heavily. While younger white southerners still favor the GOP more than any other region, the contrast is not as extreme in their case.
Good point, the people chanting ''n go back to Africa'' when schools were desegregated are only in their 60's and form the core of the Republican base in the South.
With all due respect, you are making generalizations that are as ignorant as the folks you seek to impugn.