The new Polish WWII drama 'Hatred' (Wolyn) has been released and ought to be looked out for. The ‘Hatred’ is about the ethnic tensions and massacres in the Volhynia region of Poland (now Western Ukraine). Poles, Ukrainians, and Jews lived in the region until the Soviets and Nazis came in back in 1939.
I'm sure a version with English subtitles would be available. As you say CAC, it does seem like a heavy watch though. Given the high loss of life in Poland (17% of the population!) vs all other nations we could probably use a few more films like this.
Torrent for this film is available on several torrent sites but I haven't seen and subtitles yet. English subtitle is, however, supposedly available.