And you have no supporters? Who was to blame? Saddam or Your Rehbar?
Shah never threatened to overthrow Saddam, it was also Saddam who on request of Shah deported Khomaini and Shah helped Saddam to deal with coup..it shows they were cooperating.
Saddam welcomed Iranian revolvution and desired to develop friendly relations, but Khomaini remain hostile. Even when he threaten to overthrow Saddam, he responded respectfully.. but you cant stop some people.
first Saddam come to power at July of 1979 and Iran revolution happened at Feb of 1979.
So, during Shah time Saddam wasn't solely power in Baghdad, he was part of power.
You can not teach us something that we live in. Saddam did not attack b/c he think we want to export revolution that was childish claim.
We had long border problems with Iraqis for long time, Shah bought most of his weapons because of fear from Iraq.
He build many bases and fortifications in the Iran and Iraq border for clear reason.
then we made deal with Iraqis in 1975
https://en.wikipedia.org/wiki/1975_Algiers_Agreement
after 1979, when Saddam came to power he thought b/c of bad situation in Iran he can make better deal, so he destroyed 1975 deal.
Go and read that time speeches and Interviews of Saddam regime. Saddam regime was Pan Arab regime which wanted to destroy his Imaginary majoosi farsi in Eastern gates of Arab world and bring back glory to Arabs. his goal was occupying Khuzistan province and annexing it to Iraq.
He made same mistake as Trump currently did and later he tried to end war with coming back to 1975 war without paying any cost for his dangerous adventure, but Iran refused and said Saddam must pay for his adventure and UN must recognize Iraq as invader, so 598 un resolution recognized Iraq as invader and Iran accept it.
https://en.wikipedia.org/wiki/United_Nations_Security_Council_Resolution_598