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It's hard to think of a good American equivalent to Germany's Thilo Sarrazin, the politician turned best-selling author. The closest one could be Pat Buchanan: in some circles, he and his writings are considered entirely legitimate. In others, they're considered shocking and revolting to the point of scandal. The last time that Sarrazin, the former German central bank director, wrote a book, he suggested that African and Middle Eastern immigrants were destroying the country, in part because of "hereditary factors" that made their children stupid and violent. He suggested educated Germans out-breed them. Controversy raged for months.

Now, Sarrazin is addressing the euro crisis.