I have the book, and started it, but then all my books got packed up. The most recent book that I finished on the subject was "Hitler's First Hundred Days." It was a bit too on the nose. https://www.amazon.com/Hitlers-First-Hundred-Days-Embraced/dp/1541697456/
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In effect, there was a crisis, and a faction in the bureaucracy had a radical and extreme plan that they were able to get other bureaucrats to agree to.
If you watch the Wannsee movie Conspiracy, it's really a business meeting.
https://www.imdb.com/title/tt0266425/
From 1939-41, they engaged in random mass violence at the war front.
In 1941, things changed as the government suddenly had a lot more Jews.
Heydrich shows up with a solution. When Eichmann runs the numbers, it's like any meeting where a brilliant solution to an intractable problem is presented.
All other options are dropped.
When folks look at Trump, they focus on his words, not the implications of policies being implemented by Bureaucrats.
That's the danger.