I can second that. I know people who lived there during the time of the Shah, and he was hated for his dictatorial powers and secret police, not for anything to do with Western cultural influence. And the witnesses I'm talking about were secular, engineer types who never set foot in a mosque.
I lived in Tehran [1977-79] including through the arrival of Khomeini in February 1979. I left on March 31, 1979. The Iranian Revolution had less to do with religion and more to do with corruption and oppression. The mullahs hijacked the Revolution and Iran is now far worse off than under the Shah.