The movie has its ups and downs, but the propaganda interludes were absolutely brilliant. I believe in the context of this discussion, the most relevant one is this: https://www.youtube.com/watch?v=l_5UZfwX0ss.
When you vote, you are exercising political authority, you're using force. And force, my friends, is violence. The supreme authority from which all other authorities are derived.
(Other than being an authority, presumably. Notwithstanding authorities on violence, such as Heinlein)