Back during the early 40's, Americans didn't fear their enemies. They made fun of them.
Why?
Dictators HATE being made fun of. Hitler even made it a crime to tell anti-Nazi jokes. So if you were caught saying something like:
"What is the difference between an Nazi and a dog? A Nazi lifts his arm."
The consequences would be dire.
But in America, it was an industry.
Warner Brothers studios put out several classics cartoons mocking this failed house-painter and part-time goose-stepper, including: Herr Meets Hare, The Ducktators, Daffy - The Commando, and Scrap Happy Daffy.
Disney got into the act with Der Fuehrer's Face and Education for Death.