The takeaway from the movie, as from real life, is the ease with which mindless blusterers can assume absolute power and then use it to destroy millions of other lives. Stalin and Mao and Pol Pot and Mugabe and Mobuto and… the list is endless. We humans, in thrall to our follow-the-leader hardwiring, are generally incapable of anything other than passivity in the face of a tyrant willing to violate all norms in order to indulge his whims.
Sort of reminds us of a certain infantile orange moron currently destroying the USA… the baby-man version of Stalin. The tyrant who follows after Trump will be the real thing.