Men like Blazkowicz's father. Men like those who marched with torches in Charlottesville. That's what's truly scary about Nazis: They're not just video game villains like aliens or zombies. They're something we can become when we're not paying attention. It is something that is already in our society.
Relate to paragraph about Rip. It is men, that walk the streets everyday, buy groceries, and walk their dogs that do these monstrous acts.