As for Iran the US caused the problem by helping to form one of the most brutal secret police force in history.
"The SAVAK was the Shah of Iran’s secret police force from 1957 until the Iranian Revolution in 1979. Trained in part by the CIA, SAVAK was an extremely repressive police force in a society that dealt with dissidents swiftly. Known to torture its victims with methods including electric shock, removal of teeth and finger nails, as well as boiling water treatment, SAVAK spent the majority of its resources weeding out and torturing either the Shia or communist opponents to the Shah’s rule. While executions were not as widespread as other secret police forces, torture was a matter of course, with many political prisoners left in solitary confinement for lengthy periods of time, deprived of sleep and burned, either by cigarette, grills or even acid. After the revolution in Iran in 1979, SAVAK was nominally disbanded, and a new Iranian secret police force, SAVAMA, as largely feared as its predecessor, took over. While SAVAMA was a new police force in name, many historians argue that SAVAMA was merely an extension of its predecessor, maintaining the same methods as before."
https://www.therichest.com/the-bigge...es-in-history/