For the next 25 years, the Shah of Iran stood fast as the United States' closest ally in the Third World, to a degree that would have shocked the independent and neutral Mossadegh. The Shah literally placed his country at the disposal of US military and intelligence organizations to be used as a cold-war weapon, a window and a door to the Soviet Union-electronic listening and radar posts were set up near the Soviet border; American aircraft used Iran as a base to launch surveillance flights over the Soviet Union; espionage agents were infiltrated across the border; various American military installations dotted the Iranian landscape. Iran was viewed as a vital link in the chain being forged by the United States to "contain" the Soviet Union. In a telegram to the British Acting Foreign Secretary in September, Dulles said: "I think if we can in coordination move quickly and effectively in Iran we would close the most dangerous gap in the line from Europe to South Asia.'' In February 1955, Iran became a member of the Baghdad Pact, set up by the United States, in Dulles's words, "to create a solid band of resistance against the Soviet Union....
Its not about fair its about whats in our strategic best interest. Had we had better or more farsighted individuals in government, not worried about the Soviets or Vietnam, we could have easily pushed for reforms withing Iran and avoided the Islamic Revolution and Jimmy Carters subsequent policy blunders. But we didn't and while u can blame the US, the point is we need to deal with Iran now and figure out how to neutralize it.