That's true. People don't realize (or they forget) that Nazism is a political movement (National Socialism) and not the German armed forces! You had to be a Nazi to be a soldier, but you did NOT have to be a soldier to be a Nazi. And you had to be a Nazi just to basicallly survive and have a halfway decent life in Germany at that time. You were given the choice (if you weren't a Jew) of join the National Socialists, or go live in another country.
Saying "All Nazis Are Murderers!" is the same as "All Democrats Are Murderers!" or "All Republicans Are Murderers!"