The Pius War: Responses to the Critics of Pius XII Edited by Joseph Bottum and David G. Dalin (Lexington Books, 282 pages, $29.95) SEVERAL MONTHS AGO, the German playwright Rolf Hochhuth, a leftist, sparked considerable outrage in Europe when he praised the work of David Irving, Great Britain's notorious Holocaust denier. In 1963, Hochhuth got his start with The Deputy, a play that demonized Pope Pius XII as a cold-blooded Nazi sympathizer who refused to condemn the Holocaust. During his pontificate (1939-1958), however, the pope earned substantial praise for opposing the Nazis and saving many Jews during World War II....