Second, Khamenei in fact presided over Iran who exercised restrain in their responses to attacks and was willing to enter international agreements. And followed them to reasonable level. They did cause destabilization by proxis, they were still regime they were. But like, what Iran regime learned was that restraint makes them look weak and makes them be bombed every couple of months. And that negotiation and international agreements mean nothing.

Third, frankly, as evil regime was, American history and role in Iran was destructive one. You cant take down elected president, put cruel monarchy in power and then play victim when revolution happens. And yes, who ends up winning bloody revolution does not tend to be nice pro-democratic side either. It tends to be the side willing to kill and risk more.