How does Elie not escape the atrocities he faces? In other words, how does he turn into a brute; what does he do that he wouldn't have done if the camps had never happened?

While in transport, the trains are filled with bodies, both dead and alive, are tangled up in each other. Eliezer feels indifferent to everything, including death. Eliezer's father is near him, but does not respond to his call and seems dead. When the train stops, SS officers order that corpses be thrown out of the car. Two men begin to throw Eliezer's father out of the train, but Eliezer revives him by slapping him viciously and screaming desperately in his face.