It would be well to consider this (from a letter in the Times Literary Supplement):
…I took (and still take) the view that “while the Shah’s government was undeniably corrupt and despotic, it was a non-starter in the regional, let alone the world, league of oppressive dictatorships”. The Shah had an ample supply of faults as a ruler, and many suffered as a result. But he was not Saddam Hussein.
The real reason for progressives’ hatred of the Shah is not what he did but that he was on our side.