Thomas Sowell was like that. He knew what real racism was. But instead of spending decades on an anti-White jag, he became a learned man who wrote numerous books and columns that exposed, for people of all races, the inherent truths found in conservatism. He retired at Age 80, not due to a change of heart, but simply to pursue his other passion of photography.
IS like that. He’s still alive and well, as far as I know.