The Shah (correctly) identified the two enemies in Communism and Islamism. He kept down Communism first by driving out the Communist seperatists in 1946, then by prohibiting the Tudeh party and later by secret police action (SAVAK).
Islamism was kept down by a different approach which was a mixture of police supression (especially when dealing with the terrorist Fedayeen in the 1950's), and bribery. Bribing the Mullahs to keep quiet proved to be effective for most of the 1950's-70's.
Then comes Carter and pressures the Shah on a) political prisoners (Communists) and b) to stop bribing the Mullahs. Carter with his misguided sense of "human rights" literally took the lid of the pot and it didn't take long for the Commies and Mullahs to instigate a Revolution. Carter withdrew his support to the Shah and literally let him hang out to dry. He eved cowed to the Mullahs threats and barred the Shah from entering the USA.
I agree. When Carter blocked the Shah from entering the U.S. it revealed the fraud (Carter) for what he was. The Shah was dying from Cancer. Carter, who used righteousness when objecting to the Shah’s tactics, none the less forbid him to seek medical attention in the United States. Carter was some Christian.
The Shah was an ally of the United States. When Carter sold him out, it sent the message around the world, the U.S. would sell out anyone. Carter went on to sell out Taiwan to the likes of Ho Chi Min’s pals.
Christians (not on your life) like Carter besmirch the reputations of all Christians. What a miserable failure of a man.