Gonna take a LOT more than a few posters being taken down... but, I firmly believe the Iranian people will, one day, rise up against their hard-line leaders.
I work with people (Europeans) who routinely visit Iran. To a person, they tell me the Iranian people largely ignore their government. They hate them, and just try to stay OUT of their way. They say most Iranians desperately want to be out from under international sanctions. They’ve been hurt by them for decades now.
The recent increase in tensions with Saudi Arabia is ramping up public fervor. It’s one thing to have a tough time doing business. It’s another to be worried about Saudi bombs, or being drafted into another bloody war.
Tehran is not Iran, just as NYC isn’t a representation of the US.