Iraq was becoming a communist country and they wanted to invade Iran , to make it a communist country, which is why the Iran Iraq war happened but
Thats why Iranian revolution happened was because they wanted a communist country they used the Islamic religion an excuse to invade and get rid of the royals of Iran, not everyone wanted the communist country in Iran a lot were forced for it those whom didn’t want it , were killed, or executed.
Communism routed from France and they got rid of their royals , because it was a poor country and their were a lot of poor people for them to agree with each other, and had spread the idea in a lot of European countries, I guess it helped their nations as now Europe is a rich continent, but it wouldn’t be rich without corrupting Iran