How or why Scott Adams went completely of the rails is perhaps something we'll sadly never understand. Was this opinions he'd always had, but suppressed, did he somehow become radicalized or was it perhaps medically induced, e.g. a stroke or something. It was incredibly sad to see him throw away his life's work and go down a path most of us at least hadn't foreseen and die having alienated his fans.
I didn't know about his comments about Black people until today. It's more than a bit pathetic that he devolved into colour-based absurdities so late in life. For someone who could pattern match the reality of life at a large company so effectively, it's unfortunate he couldn't realize he was being played by 4chan trolls and fellow travelers in the media.