If you haven\u2019t seen the fascinating Netflix documentary about Rachel Dolezal, a troubled woman who pretended to be black when she\u2019s actually white, you should. It\u2019s not worth getting into the controversial racial issues that the documentary brings up, but it\u2019s worth watching them in the documentary, since it shows them in all their very human complexity and contradiction. What is worth noting here is a comment that one of Rachel\u2019s adopted younger brothers (who she ended up raising her...