I don't have a problem with being wrong in the past...
...and learning from it, changing, and going forward. When it starts to look very much as if everything past "being wrong in the past" is a show put on to attract voters, then voters should take that very seriously.
People who favor segregation will vote for the guy. Everyone else should give it some thought. As far as the SML post, that's a party decision and has nothing to do with me.