I know Goebbels was using Edward Bernay’s “Crystallizing public opinion” for much of his propaganda.
Bernays is kind of a sad case. He was a progressive Jew who worked for everyone from Woodrow Wilson to the great Calvin Coolidge. In fact, Bernays can be credited with us eating bacon today since he was hired pork producers to run a PR campaign to sell what was seen as scrap at the time.
Bernays said he was shocked to find that Goebbels was using his book to promote the extermination of Jews. I tend to believe him but he does show a sad fact about progressives and their unwillingness to accept failure.