Don’t agree with your analysis of the CIA op.
The Shah was good at suppressing muslim crazies - and the percentage of muslim crazies in Iran is high. I don’t know that a democratic form of government would work in present day Iran - even given the fact that Persians are a highly intelligent people group.
The CIA released all the records. They are online. They fully admit it. Islamists weren’t an issue until we installed a dictator. They were ready for and actually using an elected government that was pretty decent. But the Brits wanted their oil. So we installed a puppet.