I wasn’t sure to post this in the movies thread or horror movies podcast thread. While listening to the podcast, I kept thinking of The Chekist. It is a story of a Soviet Chekist organizing and systematically committing mass executions during the Russian Civil War. The film is deeply disturbing. The film is described as an historical drama, but it has all the characteristics of a horror film. You can watch it on YouTube with English subtitles. There is no gore, but it is filled with extreme realistic violence and non-sexual nudity.