היי תוכלו להגיד לי אם זה עונה על השאלה?

What is the theme of the story? explain.

I believe that the theme of the story is:
The more violent a person is, the less empathy we feel for him, even if he is the victim.
When Bill and Sam announced that they are going to kidnap a kid, I felt sorry for him. However, later on, when we meet Johnny, we can see how violent he is, and even though he is the victim in the story, I didn't feel sorry for him anymore.