Here's what we can infer:
* Kotler is initially intrigued by Bruno: He finds Bruno's naivete and curiosity amusing, and he often teases him.
* Kotler is also cruel and indifferent: He treats the prisoners with extreme brutality and shows no remorse.
* Their relationship is complex: Kotler uses Bruno for his own amusement, but he also seems to be somewhat protective of him.
Ultimately, the novel leaves the question of Kotler's feelings towards Bruno ambiguous. It's up to the reader to decide how they interpret their interactions.
It's important to remember that:
* Kotler is a fictional character. While his actions and behavior may reflect real-life events, he is not a real person.
* The novel explores difficult and sensitive themes. It's crucial to approach the book with critical thinking and sensitivity.