Well, it's not that easy. Families are involved as well. And in Nazi Germany knew that if YOU screwed up your entire family went into concentration camps. Yup, millions of non-jews were gassed as well.
Oh, I know it wasn't easy. It wasn't easy for our revolutionaries, either. But it's false to say that young German men had no choice at all. Was it Franklin who said, "resistance to tyranny is obedience to God"?