Hollywood didn't do that to Amadeus; Peter Shaffer did. It was a very successful play (and even further from a historical document) before it became a period movie.
JFK is another odd example; the movie was notorious as a departure from the historical record, and cemented Stone's reputation as a conspiracy enthusiast. Very shortly after the film was released, that reputation became part of the marketing for the movie!
JFK is another odd example; the movie was notorious as a departure from the historical record, and cemented Stone's reputation as a conspiracy enthusiast. Very shortly after the film was released, that reputation became part of the marketing for the movie!