explain the conflict that ensures over eliezers shoes. How does that negate everything th men have been told about surviving in the concentration camps?

I'm thinking you mean in Chapter 4. The head of Eliezer's tent is a fat and predatory-looking German. His assistant tries to get Eliezer's shoes by offering to put him and his father in the same unit, but Eliezer refuses, even after he offers an extra ration of food. The shoes are taken from him anyway.