Every few years in Germany the toxic legacy of Adolf Hitler and his fascist regime are perused once more in heated debates between historians – so-called Historikerstreit. Usually inward-looking affairs, what makes the latest such row interesting is the Irishman at its centre: UCD historian Mark Jones. On the evening of January 1st last, in something of a master-stroke of timing and marketing, the Dubliner appeared on German evening television news, strolling through the Brandenburg Gate to be interviewed about his new book, 1923: The Forgotten Crisis in the Year of Hitler’s Coup. This was when the first serious cracks...