In October 1943, Berlin sent to order to Rome to round up 8,000 Jews for deportation. On the 16th, the Nazis captured 1,200 Jews. The Vatican's protest arrived at the German headquarters in Rome about noon. It was immediately conveyed to Berlin by telephone, and by 2 p.m., the order came back to halt the roundups. The Nazis released only about 200 of the people they had already captured, but large-scale roundups came to an end in Rome.
People fail to put things into the context of the times.
I think that is one of her most serious problems. She expects to find documentary evidence of papal instructions, but rescue operations were carried out with whispers. Paper was dangerous. They approached Pius to act as an intermediary. He not only passed messages back and forth between the conspirators and British diplomats, he even informed the British about planned German troop movements.