CHARLESTON, S.C. — Taking the podium before hundreds assembled for Labor Day weekend activities in downtown Charleston, the Rev. Joseph Darby said he has no doubt that South Carolina Gov. Nikki Haley was deeply affected by the slayings of nine black churchgoers earlier this summer. But the second-term Republican, the daughter of Indian immigrants, may have diversity in her background but has a warped sense of racial reality in South Carolina and is misguided when she talks about the state having racial harmony, Darby told a crowd of around 500 gathered in Marion Square. “She still needs a little bit of education,” said Darby — an official with Charleston NAACP and longtime friend of Clementa Pinckney, the senator and pastor slain with eight others at Emanuel African Methodist Episcopal Church in June — to cheers and applause from those gathered in the hot morning sun.