Answer: Both characters are motivated by the desire to construct the windmill.
Amir feels unbearable shame for mistreating Hassan. Amir feels as though Assef has been diminished by his own darkness. They were both comparable characters who just chose opposite paths, which is reminiscent of the hero/villain narrative in the movies they loved to watch. To demonstrate how Amir is developing and becoming more self-aware, Hosseini shares this dream.
As the story opens, Hattie Owen is in her home. Her parents have gone
out for the evening, but she isn't alone because the family operates a
boarding house and Mr. Penny and Miss Hagerty are both upstairs. Hattie
is watching home movies. She's pleased that her father trusted her to do
everything, from setting up the screen to feeding the reels of film
through the projector. She says that she turned twelve the previous
summer and that she will forever look at the summer as a turning point
in her life because of Adam. She says that she dates things as "before
Adam" or "after Adam".
As the movie begins to play, Hattie sees Angel Valentine, who was
also a boarder over the summer when Adam came. Angel is standing on the
front porch of the boarding house, waving toward