I think Amir's the reaction to the situation was reasonable because he was told that his entire life was a lie, that he had a sibling who be betrayed, and maybe if Baba or Ali told him early he would not have done what he did, as well as he would have not separated a child from his father, and would not have lost his brother. It is really sad that Hassan died without knowing the entire truth that the one person he looked up to his entire life, his best friend was actually his