Answer/Explanation:
Marji's father initially disbelieved the dangers of an attack on Tehran because he thought that the Shah's regime was strong enough to stop any kind of rebellion. He also believed that the people would not rise up against their government. Similarly, the chorus in "Oedipus Rex" was in disbelief of Teiresias' prophecy that Oedipus had killed his father and married his mother. They believed that the gods would not allow such an atrocity to happen.
In both cases, the rationales for their stances are based on their beliefs in the strength and stability of their respective governments or society. They both have a sense of security and trust in their established systems.
However, there are also differences between their stances. Marji's father's disbelief in the attack is a result of his loyalty to the government and his lack of understanding of the grievances of the masses. The chorus' disbelief, on the other hand, is rooted in their belief in the power of the gods and their own sense of morality. They believe that the gods would not allow such a horrible crime to be committed.
Overall, their stances on disbelief share similarities in that they are based on trust and a sense of security in their respective systems, but differ in their specific reasons for disbelief.