>>212439058 (OP)It was actually pretty hard to piece together his motivations. From what I can tell he
>had violent urges, and enjoyed committing violent acts>hated being double-crossed>cared a lot about winningI think he didn't really care about killing Jews specifically, he was just a violent dude in general. He was fine with letting Shoshanna live because he had already slaked his immediate urge for violence, and she would always know that he beat her and could have killed her if he wanted to.