An estimated 98% of Iranian people identify as Muslim.  Of course, it is not as if they have much choice in the matter. The Lord has punished the past disobedience of the Persians by subjecting them to the Arab created tyranny decreed in the Koran. If they had just served the Lord their God in sincerity from the get go, they would not find themselves in this mess.

As with their cursed neighbor nations, Iranian life revolves around daily prayers to their false god. Businesses close during Islamic prayers and holidays. Books and speech critical of Islam is outlawed with strict criminal penalties. Conversion away from Islam to any other religion brings the death penalty as does proselytizing any other religion. Islam allows for child brides and polygamy which violates Jesus Christ’s clear command that marriage be define as one man, one woman, one lifetime.

Islam carries with it the unending sectarian violence between the Shi’ite majority in Iran and the Sunni minority. Just as Iraq to the West struggles with the endless violent conflict between these heretics, so Iran must as well.

They must carry the burden of the tyranny of Islam with them until the Lord returns in his glory.
Other false religions do exist in Iran as well.  Zoroastrianism goes back to the 5th century BC and had previously been the state religion. Basically, this religion resembles modern day, namby pamby so-called Christians who teach that everyone goes to heaven no matter how much they disobey God. Some Iranians consider themselves Christian but they must be cowards because they have no visible presences crying out against the false doctrines of the Islamic Republic.