I heard last December from an Iranian Christian that a lot of Iranians (especially those too young to remember the Shah) are Moslem in name only, and they find other religions more interesting, like Zoroastrianism.
Unfortunately this imam will have to change his name if he shows himself, like Walid Shoebat, the former Palestinian terrorist who's now a Christian.
Yes, I'm sure he will. Muslims don't like folk who change religion. They like to separate them from their heads...