Some of them may. But over the last 25 years I've seen video footage and pictures of vile, angry throngs of them calling for "Death to America", burning our flag, kidnapping and killing our people, hijacking our planes and boats, feeding the Iraqi insurgency and giving a great deal of help to international terrorism. If the Iranian people in general were against this sort of thing I don't see how all of this could happen for so long and with such great frequency. Islam has always been a threat to the rest of the world and Iran is no exception.
Freeper freedom44 has pictures of a candlelight vigil that was held in Iran immediately after September 11th, in honor of the US terror victims. It is really moving to see the photos.
We saw the same thing with the Iraqis. Saddam was always voted back in office, etc. It's amazing how many people will "turn out" to chant "death to America" when they fear for their jobs, their lives or the lives of those they love. There is nothing like a Dictator and his Shredding machine to motivate folks to show their support openly.