The Great Dictator/YMMV

• Harsher in Hindsight: Chaplin only had a faint picture of the atrocities occurring in Nazi Germany when the film was being produced, based on what refugees from Europe had told him. Back in 1940, the worst things have not started yet anyway. He stated that had he known the full extent of the Nazis' crimes, he'd have never made the film. The concentration camp scenes in particular make for quite awkward viewing.
• Memetic Mutation: A rare positive example. For some reason the Rousing Speech has been seeing some spread, in the form of clips like this one.