If you have basic knowledge of ww2 and topics that relate to this movie, you won't notice the inaccuracies. But German POWs held by the soviets had a mortality rate of over 90%. The soldiers tied to Leningrad, Stalingrad, Belorussia and any SS would be killed quickly and garunteed.
Also, in the movie they are trying to root out SS. In reality all the SS had a tattoo on them indicating their blood-type and it certified their racial purity. The soviets knew of these tattoos so a quick strip search would quickly weed out the SS.
The Nazis devastated the Slav populations. They killed commissars on sight, killed almost all Russian POWs, destroyed hundreds of German towns, exterminated Russian civilian populations, broke the German-Russian non-aggression pact, sent civilians and prisoners through mine fields and used them as human shields, kidnapped aryan-looking babies for the lebensborne program, Inacted a scorched-earth policy, starved Leningrad into cannibalisn, committed genocide (especially in belorussia and Ukraine and western Russia, allied with Finland, killing off 80% of all Russian 20 year-old males by 1943, and used Slav women/children as human shields while rushing soviets positions... not to mention officially labeling Russians as "untermensch" (sub-human) and treated them with a pest-extermination attitude while refusing to acknowledge the Geneva convention; in some cases burning barns full of people and forcing POWs to lay down side by side while they freeze them to death water in order to make a sturdy ice-road.... whole areas of Russia were decimated beyond repair, hundreds of thousands of families were exterminated, countless Slavs became slaves, whole regions were burned and bulldozed to nothing, their Jews were almost wiped out and multiple generations of Russians suffered life-long ptsd.
Factoring all that it is clear to see that the Russians were unrealistically civil and empathetic towards the Germans in this movie. The women working in this camp would almost surely be widows and childless due to the war.
I don't support the treatment of German POWs and civilians after the war.... but to say I can't understand the ruthlessness of the Bolsheviks towards the Germans, would be a lie. I can't imagine the pain that nation experienced while trying to rebuild, recover and re-identify.
