Actually it was called the Iran-Contra Affair.
So given that Iran has supported terrorism for more than a decade, have made it abundantly clear their enemies are the US and Israel, why aren't you similarly understanding about why the US and Israel would attack Iran?
The accusation of this post is that the US is being hypocritical by being against Iran while also occasionally negotiating with Iran. Aren't you being hypocritical when you say you're "not surprised" when "Palestinians" terrorism while also pretending to be outraged over the obvious response to such actions? I put Palestinians in quotes there because it's how you said it, I personally find how you imply that all Palestinians are terrorists to be disrespectful to Palestinians. Hamas did the terrorism and they did so because of the support of Iran.
The last two regimes were very authoritarian, one was backed by the Americans, and the one before that was leftist and democratic, which explains why the Americans interfered.
You're talking about a regime that hasn't existed for over 70 years. That's some really extreme tankie behaviour to feel sympathy for an authoritarian country because 70 years ago there existed a dodgy politician that tried to nationalize things in that country. You're complaining about the realpolitik nature of international relations while engaging in that same kind of mindset yourself by jumping to the defense of any country that opposes countries you don't like.
To me, there are reasons for countries need to deal with authoritarians by necessity. There is no necessity for an individual to pretend an authoritarian country is good simply because they're in opposition to countries you don't like.
While you're being understanding of terrorist actions in response to oppression, maybe you should try to be understanding of a war in response to terrorism and who is ultimately responsible for those terrorist acts. It sure as hell isn't the Palestinian people that are benefiting from actions of Iran and Hamas.