Bod and the graveyard people who raise him all learn a lot about compassion and forgiveness through the process. They learn that the impossible can be possible when it comes to helping out a fellow. Some of the more compassionate moments include Mrs. Owens's willingness to raise Bod, and later Bod's quest to get a gravestone for Liza. We come away from The Graveyard Book with more compassion for both the living and the dead. But we also walk away with some important questions, which don't have easy answers. For example, is it possible to forgive someone who kills your family and tries to kill you? Can compassion and forgiveness help someone switch from good to evil?
Bod should have found a way to forgive Jack and to help him grow as a person, instead of tricking him into a cruel death.
There is no problem with the way Bod dealt with Jack. No amount of forgiveness would have saved Scarlett’s and Bod’s lives.