Considering what the Nazis did to the Soviets, I think the Russians were relatively restrained. Basically, the Russian army had orders to rape every German woman, if possible. As we know, rape is a horrible strategy used to vanquish and humiliate the defeated. The Russian army raped more than 100,000 German women. So much for purity of race.
When the book came out in 1953, Germans were outraged because they saw it as staining the honor of German women (which were basically trying to survive), and no German man wanted to see himself in the mirror as an impotent (in every sense of the word) loser; so the author, duly enraged at this unbelievable but not unsurprising reception, forbid its publication until after her death. I recommend the book much more than the film.