In the Kite Runner, how does Baba, Amir, and Soraya's pasts affect their present lives?

Baba lives with the guilt of having an affair with Ali's wife and neglecting his biological son, Hassan. Baba refuses to acknowledge that Hassan is his biological son because Hassan is a Hazara, which is a discriminated minority ethnic group in Afghanistan. Baba ends up finding redemption by sacrificing his livelihood and immigrating to America in order to give his son Amir a new start at life. In America, Baba works a low-paying, difficult job in order to make ends meet and develops a genuine, loving relationship with Amir.
Amir lives with the guilt of passively watching Assef rape Hassan without intervening. Amir's feelings of guilt and jealousy ruin his relationship with Hassan and scar them both for life. Amir's guilt affects him well into adulthood and he is plagued by the memory of watching Assef rape Hassan. In order to atone for his past sins and find redemption, Amir travels back to Afghanistan, where he saves Sohrab (Hassan's son) from a life of sexual abuse and trauma.
Soraya's past sins negatively affect her relationship with her parents and ruin her reputation among the Afghan community in America. When Soraya's family moved to Virginia, she ran away with her boyfriend, and General Taheri went after her. After bringing her back home, General Taheri forced her to cut off all her hair and moved the family from Virginia because she had tainted their reputation. While she was living with her boyfriend, Jamila suffered a stroke. Soraya blames herself for her mother's condition and struggles to overcome her negative reputation in the Afghan community, which makes it difficult for her to find a suitable Afghan bachelor.