“If we acknowledged what should be obvious — that much constitutional language is broad enough to encompass an almost infinitely wide range of positions — we might have a very different attitude about the obligation to obey.”
Translation: Hitler didn’t need a constitution, so why should we?
Actually, I believe the Weimar constitution had a dictator clause, so the Third Reich was perfectly legal, at least at first, though he definitely didn’t hold fair elections to cement hus rule.