From The Economist:

As he admits, Hitler’s Pope (1999), his biography of Pope Pius XII, lacked balance. “I would now argue,” he says, “in the light of the debates and evidence following Hitler’s Pope, that Pius XII had so little scope of action that it is impossible to judge the motives for his silence during the war, while Rome was under the heel of Mussolini and later occupied by the Germans.”

Hat tip. Good for him for being honest, but one imagines the damage is already done.