Final answer:
Marji's uncle Taher is primarily saddened by his serious health issues requiring surgery and the inability to secure a passport due to post-revolutionary restrictions in Iran, both of which cause him and his family great distress.
Step-by-step explanation:
Marji's uncle Taher is saddened by two main things: the grave state of his health, which eventually requires him to have heart surgery, and his inability to obtain a passport for travel due to the restrictions of the post-revolution regime in Iran. His deteriorating health and the consequential sense of entrapment within a country undergoing turbulent changes lead to a deep sorrow and disheartenment in Taher.
Family members, witnessing his anguish, are further saddened by his suffering and the oppressive circumstances that exacerbate it. The limitations posed by the new government and his critical health needs amplify his distress, contributing to the emotional strife experienced by Taher and those close to him.