They hated her...Yeah sure.
Actually...I have no idea...But at the time of segregation, the South was a Democratic Party stronghold.
Areas that had the greatest segregation were interestingly enough also the areas that were the most solidy Democratic.
I suspect that is probably still true in some pockets of the south: Most Democratic - Most blatently racist. But then how could you really measure such a thing?
Also, read up on organized labor and it's relationship to keeping the Southern blacks in a state of perpetual poverty. The Democrats have always been in the back pocket of organized labor. And Organized labor has always been (and continues to be) a hot-bed for racism.
Note for Bowser: "Organized Labor" is a fancy way of saying "Labor Unions".