Iran is one of the fastest-growing Christian nations in the region (talking about new converts, if we are talking about Children being born to Christian families, then it is Israel). People see Islam for what it is, an expansionist colonial religion that subjugates its people . So many Iranians I know are either Christian, agnostic, atheistic or mulism in the loosest sense of the term (aka go to the mosque for major holidays and that's about it, they still drink, dress, and have sex like westerners. Sorta like how most Americans are Christian, but they only go to Easter, Christmas, marriages, and funerals.