Dr. Joseph Lichten, a Polish Jew who served as a diplomat and later an official of the Jewish Anti-Defamation League of B’nai B’rith, writes: "Pacelli had obviously established his position clearly, for the Fascist governments of both Italy and Germany spoke out vigorously against the possibility of his election to succeed Pius XI in March of 1939, though the cardinal secretary of state had served as papal nuncio in Germany from 1917 to 1929. . . . The day after his election, the Berlin Morgenpost said: ‘The election of cardinal Pacelli is not accepted with favor in Germany because he was always opposed to Nazism and practically determined the policies of the Vatican under his predecessor.’ "[4]
Former Israeli diplomat and now Orthodox Jewish Rabbi Pinchas Lapide states that Pius XI "had good reason to make Pacelli the architect of his anti-Nazi policy. Of the forty-four speeches which the Nuncio Pacelli had made on German soil between 1917 and 1929, at least forty contained attacks on Nazism or condemnations of Hitler’s doctrines. . . . Pacelli, who never met the Führer, called it ‘neo-Paganism.’ "[5]
Further reading - "Three Popes and the Jews" by Rabbi Lapide or http://www.catholic.com/library/HOW_Pius_XII_PROTECTED_JEWS.asp
If he’d done anything meaningful he’d have been killed. That he survived indicts him.