I don't know why any Catholic would ask the original question. He was a mass murderer, he used human beings as medical experiments, he started a brutal war of expansion that killed 3% of the world population (a massive amount) and also killed (for example) 2 million Poles who were Catholic. According to Just War Theory you could never say his war was justified. His ideology was based on wacky occultism and "the Aryan race". Sure if he said "the sky is blue" that doesn't mean we shouldn't say the sky is blue but I would not touch his thinking or ideology with a 10 foot pole. Plus I've noticed that a lot of people on here are trying to bend the story to make him out to be an ok guy, he never was. I also think its a bad look to associate oneself with anything having to do with Nazism. Sure, you could try to debunk this with countless conspiracy theories but I really don't think you can convince me that the story of WWII is entirely made up when there are so many common people who were there. I have relatives who killed Nazis, and I would do the same if that ever came back.