There is a basic flaw in Godwin's Law: sometimes people say or do things that ARE like the Nazis.
Thus, when arguing about Windows v. Linux or Ford v. Chevy, for example, Godwin's Law applies: the first person who makes a reference to Nazis has probably lost the debate.
But when we are talking about liquidating the disabled or racism or anti-Semitism, for example, Godwin's Law must be suspended.
Exactly. Unfortunately, while essentially everybody agrees the Nazi are evil, most people have very a distorted and incomplete picture of how they got there.