If you read your history, the Church did everything it possibly could to help Jews escape (please read about just one wonderful priest, Monsignor Hugh O’Flaherty) and to protect escaped victims of Nazism. The Church had to walk a tight rope between condemning Hitler and having all churches closed down, or quietly working behind the scenes to smuggle people out. They did both, in many instances, and many priests and Catholics were killed in concentration camps along with Jews and others.
No, the people of the Catholic Church have never been perfect, and no one claims that. But during World War II, they did a heroic job of standing up to Hitler and protecting Jews as much as possible.
Any time human beings are involved, there will be imperfection. There will be error and there will be misjudgment. The Church, the Body of Christ, is perfect: it’s impementation in the hands of humans in this human world cannot be at all times.