Hosseini sets up Hassan’s scapegoat archetype from the jump. Giving him a cleft lip and being part of the Hazara.
“And the cleft lip, just left of midline, where the Chinese doll makers instrument may have slipped, or perhaps he had simply grown tired and careless.”
Hassan’s cleft lip represents innocent impurity. He’s imperfect but did nothing wrong to have a blemish cast upon his lip. Hassan also naturally takes up for anything that is assumed on him.
“Did you steal that money?” “Yes.”
Hassan taking up for something he he knew absolutely nothing about is another way Hosseini squeezes every last drop of sympathy from readers so that they get the full emotional impact of Hassan’s “scapegoat archetype.”
In the middle of the book, Amir starts to become his own man, he marries, somewhat gets over his father’s more-or-less psychological abuse and has a home with his wife. Hosseini chooses to get Amir’s life together to disassociate any guilt the reader may feel for him.
“A few months later, we used the advance for my second novel and placed a down payment on a pretty, two-bedroom Victorian house in San Francisco’s Bernal Heights.”
Hosseini does choose to bring up Hassan I this section of the book but only as Amir’s curiosity with how his life is going.
In the final chapters of the book Amir has gotten from Rahim Khan to head back to Afghanistan to save Hassan’s son Sohrab.
"There is a way to be good again.”
Rahim Khan tells Amir. Sohrab is the books second and last scapegoat. He takes the roll over his father considering their many similarities. Hassan and Sohrab were both raped by Assef, they both loved books, and they are both innocent and “life” treats them in a cruel manner.
“He took Sohrab a month ago.”
Hosseini pulls all the empathy out of the readers once more through Sohrab’s misery.
All-in-all the archetype that Hosseini paints through Hassan and Sohrab create the most emotional elements in the book. But the characters also tell of how cruel life can be to the least deserving of its recipients. We also learn through them that even if you face past atrocities you can always retain your joy and happiness.