 SPOILER: A nuance for those who dont speak German: In general, the  German officers use the informal version of "you" ("du," etc.) when  talking to the Jews, which reflects their views (you wouldnt talk  to adult strangers that way); however, Hosenfeld (the officer who  discovers Szpilman in hiding) always uses the proper formal form  ("Sie," etc.) because of the way he personally feels.