The film is just basically a lampoon on Hitler and how he treated the Jews. Chaplin plays the Dictator Adenoid Hynkel who's the films villain and a Jewish Barber who's the films main character. Chaplin is best known as the silent character but in this film (Even though he's probably talked in other films) he can act with dialogue. When he's the Jewish Barber (Who by the way isn't his Tramp character) he's both funny and dramatic with lots of emotion behind it. When he's Hynkel, he's so funny, over the top and idiotic that to me he is the perfect mockery on Hitler. Where I surrender my emotions and get chills from Chaplin is the touching speech he gives at the end, it's truly one of the best acted and well written speeches I've ever heard in film. The supporting cast such as Paulette Goddard as the love interest, Reginald Gardiner as the barber's friend, Henry Daniell as a parody of Joseph Goebbels, Billy Gilbert as a parody of Hermann Goring and Jack Oakie as a parody of Benito Mussolini, are all funny and great as their characters.
Out of all Hitler parody's, this one is really ballsy epically for it's time. It was made when we were in peace with Nazi Germany, it mocks Hitler with a passion and shows how demented he is and it satirized life in the Jewish Ghetto. What makes the film truly work is Chaplin knows how to balance the comedy and the drama. He knows when a scene should be funny, he knows when a scene should be sad, he knows what to satire and how to satire it, that's what makes the whole film and satire work. The score itself even has the same balance of drama and comedy as the film intends to be. What I also love is the films style of different comedic elements. It has satire on politics, it has a mockementary look, it has the feel and look of his silent films in a few scenes, it has some really cartoonish scenes in the film and all of them work and never feel out of place!
This is not only what I like to call the ultimate mockery on Hitler but it's also one of Chaplin's cleverest and funniest comedies of all time.