The Dixiecrats were Democrats both before and after the experiment was over, so please leave the Republicans out of it. In any case, this is ancient history and has nothing to do with what is going on in American politics today.
BTW, in America there is a constant effort by the Democrats to assign their sordid past to the Republicans. Millennials are generally shocked to find out the Confederates and KKK were Democrats. They are also shocked to find out our entries into WW1, WW2, Korea, and Vietnam were all led by Democrat Presidents. (Wilson, FDR, Truman, JFK/LBJ, respectively.)