Symptoms of discontent have percolated up before. Like when Bush II invaded Iraq and ousted Saddam and the people and students in Iran were rioting in the streets because they thought the idiot President was going to free them also.
The effort spent in that regard might have born better fruit than Iraq.
Before the other idiot Carter undercut the Shah, Iran was a relatively progressive place for the Middle East. Iraq has been a snake pit since the days of Sumer.
snake pit? Yep.
Idiot Carter? Yep.
Bush? mixed
Trump? we shall see.