What does amir observe about double standard?

Amir observes that a double standard exists in the way different characters are treated based on their social status, ethnicity, or personal relationships. He notices that certain individuals, like Hassan, are judged more harshly due to their background, while others, like himself, receive more leniency despite their actions. This realization highlights the deep-seated inequalities and biases present in their society, prompting Amir to reflect on themes of privilege, guilt, and redemption throughout his journey.