Here's a very revealing article by Rabbi David Dalin. It not only dares to oppose one of the Left's most cherished myths (Pope Pius XII being sympathetic to the Nazi persecution of Jews), but Rabbi Dalin also criticizes liberals for their failure to denounce the cleric who actually did call for the extermination of the Jews.
That cleric was Hajj Amin al-Husseini, "the viciously anti-Semitic Grand Mufti of Jerusalem, who resided in Berlin as a welcome guest and ally of the Nazis throughout the years of the Holocaust" -- a man who is yet held in high regard by Muslims around the world.
This is an important step in setting the record straight.