Pope Pius XII did do enough to help Jewish populations during World War II. He arranged asylum for Jewish people. In addition, the Catholic church was one of the only organizations that spoke out against Nazis early on in the regime. People tend to forget these points, but the Pope helped plenty. It was not even his role to do so, and he still did.
The Vatican has vast resources and should have done more, at least in secret, to aid Jews during World War II. Pope Pius XII was in a difficulty position because of the Vatican's location--Benito Mussolini's seat of government was in the same city as the Holy See. There must have been some kind of secret operation Pope Pius XII could have used in order to save more Jews during the Holocaust.
I understand things were very different, he really didn't even come forward for a long time. If the Vatican's stance was officially neutral during the war, he didn't try hard enough. The Pope also had to think about what would have happened back then, Italy was not a safe place at that time.
No, Pope Pius XII did not do enough to help Jewish populations during World War II, because Catholics and Christians were part of the problem with murdering the Jews. Pius should have said something but he didn't. The Jewish populations suffered, and Pius looked the other way because they were not Catholics.
Not only did he not enough to help Jewish populations during World War II, he was actually a friend of Adolf Hitler and the Nazi's. He paid lip service to the Jews, but that was about all. When you weild that much power, more should be done, and he didn't.