i must say you are almost right.  but the west did not create the islamic revolution.  however at that time they knew the sha was ill and the reformist factions in iran were backed by the soviets. so with the sha effectively giving up power while dying from cancer the us decided that they would rather have a religious leader in power in iran than a potential communist supported government.  at that time communism was trying to eradicate religion and the us knew that any religious leader would be extremely unlikely to be able to work well with the soviets. but they didn't actively install the islamic regime. the sha was a great friend of the us even if he had some disagreements here and there.  the us backing of israel also put the sha in a rather difficult spot being the us best friend in the region and in iran religious people kept calling him an us stooge for not opposing israel which really weakened his popular support when all muslims were decidedly against israel.
Cambodia