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.