This is a long read but you can see how the US indirectly fostered the Islamic fundamentalists.

The only person Henry Kissinger flattered more than President Richard Nixon was Mohammad Reza Pahlavi, the Shah of Iran. In the early 1970s, the Shah, sitting atop an enormous reserve of increasingly expensive oil and a key figure in Nixon and Kissinger’s move into the Middle East, wanted to be dealt with as a serious person. MORE