I hadn't before seen Charlie Chaplin's movie, The Great Dictator, but it ends with a rousing speech. First, a bit of background from Wikipedia:

Chaplin spent two years developing the script, and began filming in September 1939. He had submitted to using spoken dialogue, partly out of acceptance that he had no other choice but also because he recognised it as a better method for delivering a political message. Making a comedy about Hitler was seen as highly controversial, but Chaplin's financial independence allowed him to take the risk. "I was determined to go ahead," he later wrote, "for Hitler must be laughed at."Chaplin replaced the Tramp (while wearing similar attire) with "A Jewish Barber", a reference to the Nazi party's belief that the star was a Jew. In a dual performance he also plays the dictator "Adenoid Hynkle", a parody of Hitler which Maland sees as revealing the "megalomania, narcissism, compulsion to dominate, and disregard for human life" of the German dictator.