This is good work, but it doesn’t explain Hitler, with his incessant screaming. It’s easier for me to understand the appeal of Obama early in his presidency and initial campaign, than Hitler.
Hitler was a product of another time, when the media was geared towards screamers, everyone screamed back then for the newsreels.
Now with Television, the need to be a screamer isn’t necessary.
Living or being in fear enhances the impact of the emotional destabilization process.