Regarding Amir's decision not to help Hassan while he was being raped: Which would be worse? The physical pain of a beating that Amir might take if he had helped Hassan, or the mental strain that he might endure for decades to come? Also, would Amir feel better without Hassan around at all, or would he prefer Hassan to disappear from his life completely by planting the birthday gifts under Hassan's bed? Why couldn't Amir allow Baba to share his time with Hassan?

This is a very broad cross section of the book and will evoke some intense discussion points.  For me, the critical discussion question goes to chapter 7.  Amir's inaction at the sight of his friend being raped by Assef and his goons is probably one of the major discussion points.  I would talk about the idea of inaction and loyalty, the significance of it, and also the political significance of "looking away."  How is this relevant to the history of Afghanistan, with regards to the West?  This moment of inaction, of negation of bonds with another person, is significant.  I think that contrasting this with the idea of "becoming good again" and how it plays into the development of Hassan and Amir is of vital importance.  The visceral reaction of looking away as a person is being raped is something that can probably generate some intense emotions.  Perhaps, asking if others have been in the same position as Hassan, being violated while someone who is supposed to be a friend looks on, or Amir, not taking action when a loved one is being gruesomely violated, could really bring out much in way of loyalty and the bonds of friendship.  There is so much to discuss in this cross section of the book, but I think that a great discussion can come from here.