Today in Tablet Magazine, Adam Kirsch reviews a new book about the Dönme—a small group of Sephardim once based in Salonika, Greece, who subscribed to the teachings of the heretic Sabbatai Zevi and converted to Islam, but also maintained observance of much Jewish ritual. “The Dönme may not have been Jews,” Kirsch writes, “but they functioned in the Turkish imagination as Jews—they were clannish, untrustworthy outsiders, who were actually more threatening than the actual Jews because they had so long pretended to be Muslims.” The Scroll will update you with the latest on Jewish news and opinions all day.