This aspect of the subject is, I think, fairly subtly handled in the film; one particularly shocking scene shows a very young blonde Russian (or Ukrainian?) girl, at a kind of afternoon soirée, reciting a virulently hate-filled anti-Fascist poem, exhorting her adult audience to mercilessly butcher their Nazi enemy.
The young girl acts her part brilliantly, with appalling conviction! The contrast between her youthful beauty and the ugliness of what she is saying is superbly expressed in her face. Very powerful!