Perhaps a minor point of semantics, but Adolph Hitler was not a fascist. Fascism was Benito Mussolini's gig. Adolph Hitler was a National Socialist. After Hitler and Stalin fell out, American (and other western) communists didn't want the word "socialism" associated with their new enemy (former friend), so they appropriated Mussolini's term ...
Never mind that fascism IS socialism; propaganda depends on using the right words to make people feel a certain way.
Exhibit A:
“Fascist” was basically anyone who was an Anti-Communist. A lot harder to use the term “Nazi” for that.