Like yes, goverment put in by america wont be hostile to america. But its opponents will blame america for that goverment, because well, they are to blamr. And also, once it fails, all the suppressed anger goes out. And some more, because now america is well positioned to be generic scapegoat even for stuff it had not done.

also I would argue that we should not confuse Iran and the islamists ruling the country. as a reminder the Iranian people suffered thousands if not tens of thousands death recently during violent repression of social unrest. so it seems the Iranian people may disagree with the choices of the people in power. at least until the US joined the israel led war crimes against Iran.