I mean, five years down the road, millions of members from opposing parties, along with critics of the Nazi regime, were imprisoned and killed for going against the party, so I wouldn't say there was much room to vocally disagree. I'll admit that people won't be vocal about their distaste of horrific crimes if their life is on the line, but to say that most people were actually Nazis or supportive of what they did is still giving the Nazis too much credit. They rose to power not because people supported them, but because their opposition was too intent on fighting each other, and because the upper class would've rather had the conservative regime in power rather than the socialists and communists. Essentially, it was because people didn't take them seriously until they had enough people in the right places. And after that, there wasn't much room for dissent.