The action of Shia Muslim pilgrims going to Najaf the last few years may have had more effect than we could guess.
There are, of course, the “Students” who are constantly in an uproar about something.

But it also appears that the rank and file of the country are outraged, too. The have seen with their own eyes the difference between Sistani’s “Najaf” school of Shia thought compared to the Qom school of more militant Government -religious connection (fostered by Ayatollah Khomeini). The echoes of the diplacement of Baathist Iraq as one bogeyman, and the replacement by the Great Satan on both the Easter and Western borders of the Islamic Republic for almost 7 years, has given pause for thought.
After endless provocations, the US has not invaded or made war on Iran. The fear that holds Iran together may be fraying at the edges.