Inhumanity towards other humans: How terrible they would treat the Jews only feeding them little soup or bread as if they were animals. Treating them like they have no feelings and aren't worth anything and making them work so they could get really weak for them to die slowly or killing them.
Family Bonding: You should always have a bond with family it;s very important. Like in the story Elie and his father weren't really close but atleast they knew they had each other and would do anything for each other even if they didn't have so much communication.