If one was asked to name one, just one, trait most common among Iranians - in the Islamist fascist ruled Iran and those who have lived in democracies for most of their lives - perhaps it would be the splitting, the black-and-white or the all-or nothing thinking.
A quick glance at the opinions of Iranians on the net in regards to the current and former U.S. presidents is the best example for this behavior.
Iranian Trumpians and Obamites, both, see nothing but good in their champion and nothing but bad in the other. Consequently, the likeminded becomes an ally, no matter who it might be, the naysayer, the enemy.
This mindset, if you do not agree with me %100, you're no good and therefore an enemy, aside being inherently anti-democratic, it destroys any chances of arriving at a common ground, in this case, emancipation of Iran from an unreformable, expansionist and warmongering Islamist fascism.
At a time when many Iranians are craving freedom, to understand and trying to combat this prevelant divisive mentality is a must.
Airtight sanctions, a la against the despicable South Africa apartheid, works. U.S. lawmakers get to it.