In early September 1997, Danny Yatom, the head of Mossad, arranged a special screening for Binyamin Netanyahu, who was then prime minister. The film, shot on the streets of Tel Aviv, presented the plan for the assassination of Khalid Mishal, the head of Hamas’s political bureau in Amman. Twenty-one Israelis had died in Hamas suicide attacks in the previous two months, and Netanyahu was eager for revenge. The peace process might be undermined, but that would be just as well: Netanyahu shared Hamas’s hostility to Oslo, and had compared trading land for peace to appeasement with Hitler. Mishal, Paul McGeough...