"Unforgiven: Why is Clarence Thomas so angry?"

That's the title of this Jeffrey Toobin piece in The New Yorker. I don't think that's a very accurate title and suspect his editor was hot to spread the Thomas-is-angry-meme. What concerns Toobin is Thomas's attachment to conservative politics. Here's the concluding paragraph (which you can see isn't about anger at all):

The tenor of Thomas’s memoir, as well as his judicial record, suggests that he will continue to display his brand of “courage”—that is, to serve the interests of a conservative élite, and hearten Vice-President Cheney and his ideological kin with his exhortation “Be not afraid.” As Thomas has often said, it is a credit to the country that a man from Pin Point can be given the opportunity to serve on the highest court in the land. “As a child, I could not dare dream that I would ever see the Supreme Court, not to mention be nominated to it,” he said on the day he was selected. There is less to celebrate in the way that Thomas has used the opportunity to speak power to truth.