Fatalists in positions of power are hazardous to themselves and those around them. They think that the world revolves around them and that they are "destined" to do whatever it is they just feel like doing. Now imagine one of those guys with nukes.
We cannot depend on the clamor of the truly pro West young folks. The bulk of the popoulation si probably still pro the present rulers. Iran does have a functioning democracy of sorts and the rural folks still support the people in power. They don't write emails and demonstrate in the streets and get clubbed and shot.