"He traces the origins of Christian anti-Semitism to Constantine’s birthplace in Trier, Germany, where Crusaders sailing down the Rhine systematically destroyed Jewish communities, which the pope refused to protect unless the people converted. Centuries later Trier was the site of an agreement between the Catholic Church and Hitler, negotiated with the future Pope Pius XII, whose later refusal to speak out during the Holocaust Mr. Carroll considers to be a great shame of the church. In the most moving segment Ms. Richardson is heard reading a letter written in 1933 to Pope Pius XI by Edith Stein urging him to speak out against Nazi persecution of the Jews. A Jewish convert to Catholicism and a Carmelite nun, Stein died in Auschwitz in 1942. The letter, which went unanswered, was made public in 2003, five years after she was canonized.""