The Great Sacrifice

Opfergang is a 1944 German film directed by Veit Harlan. It is based on Rudolf G. Binding's work of the same title, with alterations for propaganda purposes. Unlike other Harlan films of the era, Opfergang does not include explicit Nazi messages, but instead features more subtle Nazi motifs and themes. The film was dubbed a "masterpiece" by Slovenian philosopher Slavoj Žižek in 2012.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.