Final answer:
Farid's comment about Sohrab being Shi'a highlights the religious and ethnic divisions in Afghanistan, leading Amir to view the country as a hopeless place.
Step-by-step explanation:
Farid's comment about Sohrab being Shi'a makes Amir think Afghanistan is a "hopeless place" because it highlights the deep-seated religious and ethnic divisions in the country. In Afghanistan, there is a long history of tensions between the majority Sunni Muslims and the minority Shi'a Muslims. These divisions have often led to conflicts and discrimination. When Amir hears the comment, it reminds him of the complexities and challenges of Afghanistan's social and political landscape, which can seem overwhelming and difficult to reconcile.