Why did ayatollah khomeini not trust the united states

during the Islamic revolution performed by Iranian nations and under leading of Imam Khomeini the late, U.S Government had many interferences in the interior affairs of Iran such that after the fining of Muhammed Reza Pahlavi from Iran, he settled to America. while U.S had known that Iranian people dissatisfied of Pahlavi and his rule, they protect the Shah. besides U.S government as a colonizer also steel the natural wealth and resources belonged to Iranian people. such a doings lead to cut relation Iran and America after islamic revolution. according to the such factors , imam khomeini could not trust the U.S since that that the past shows that they already betrayed.