It's very strange how people can buy into one aspect of an ideology but kind of ignore the rest of it. It seems to me that what a lot of Germans bought into was the whole 'glorious destiny of the Fatherland' thing - they had gotten their butts stomped in WW1, and suffered through poverty and humiliation in the decades after it. They wanted to WIN for a change, and a lot of people thought Hitler would do that for them. For them, they were just being patriotic Germans - they either didn't know about the deathcamps, or kind of partitioned them off as acceptable losses. It seems pretty horrifying looking back on it that people could deceive themselves like that, but that has always been one of the main weaknesses of humanity - given the right circumstances, people will lap up just about anything you give them and ask for more.