The high majority of people do have decent morals.

I can personally guarantee to you that 90% of the population will never agree to genocide or any other nonsense.

If Hitler had only 39% support with all the coercion , manipulation and violence that he wielded. Besides the core of the Nazis had only 1-2% of the population, before the elections. Of course after that the SS membership was mandatory in some jobs. So only about 1-2% of the population was hardcore Nazis, and another 38% were fooled into being, due to the unfortunate circumstances:

• Economic devastation
• Pride issues, due to losing WW1
• High taxes, and inflation, plus massive unemployment.

Of course Hitler made all of them worse, and his solution was to murder half of Europe, but that is not the point.

The point is that, Hitler had a huge advantage, because demagogues gain power exactly in harsh conditions.

And everything aligned up for him, and he could only convince 39% of the population to vote for him, and also let's not forget that most votes were coerced, and they also did voter fraud.

So as I am telling you, the hardcore Nazis are only 1-2% of the population, even in a devastated country despite all the propaganda.

So how can you say that 90% of the people could adhere to an extreme ideology, when even the Nazis had only 2% of the population as fanatics?