If you have never heard of the Mosaique religion or of the Djougoutes, an ethnic group including up to 12,000 Iranians, you are not alone. They do not exist. But they helped save thousands from Nazi death camps in World War II, when an Iranian diplomat made them up out of whole cloth in a daring ploy to conceal the real identity of over 2,000 Jews in German-occupied France. On International Holocaust Remembrance Day, when the world remembers the tragedy of the Holocaust, the story of Abdol Hossein-Sardari, the Iranian consul in Nazi-occupied France during the war, strikes a chord. Not only does it recall Oskar Schindler, the German businessman who inspired "Schindler’s List", the 1993 Oscar-winning film by Steven Spielberg; it may have been even more daring than Schindler's use of his good relations with the Nazis to employ hundreds of Jews in his factories, shielding them from death after the German invasion of Poland in 1939. Sardari actually managed, in his...