There was no realignment. Who owned the slaves? Who was responsible for Jim Crow and the KKK? Which party set up the Great Society which destroyed the black family? Which party controls the teacher's unions and the public schools?
The Democratic party. 100%. Those are just facts.
We can't fix this until we quit the partisanship. We need to fix the public school system. You'll remember the teacher's union official, who, when asked when he was going to start thinking about the kids, replied, "When they are old enough to vote."
EDIT: Please read at least the introduction to the "Dixiecrat" splinter party page for history[0]. (Wikipedia isn't known for having a conservative slant on things.)