Outside of extremely rural and isolated areas, prosecuting the Klan is not a liability. The areas that Jones needs swings in a not areas where a whole lot of people would like to be associated with the Klan. That isn't to say that he'll win, but I don't think that most people in Alabama are angry that he prosecuted actual murderers.
Not angry but it still doesn’t help him in any aay
Well, in the event of pigs flying against the backdrop of a blue moon, the first and most critical thing Jones needs to do to win is max out turnout in the Black Belt. He needs to annihilate what's left of Moore's small AA base, and emphasizing that part of his background would be a good way to do it (especially after certain comments Moore has made relating to race).