Today, Shiite Islam predominates.
Islam
The dominant religion of Iran is Islam (majority Shi'ite), while the Baha'i Faith is the largest non-Muslim minority religion.
The dominant religion in Azerbaijan is Islam, but due to the Soviet occupation, most Azeris are rather liberal in their religious outlook, especially when compared to the Azeris in Iran.
The Safavids were responsible for making Twelver Shiite Islam (as opposed to Sunni Islam) the dominant religion of Iran. They were notorious for their belligerent treatment of Sunnis, especially in the western provinces.
Christianity is the most dominant religion.
buddhist is the dominant religion in asia
Before the start of Islam, the dominant religion in the Arabian peninsula was paganism, although there were significant minorities of Christians and Jews. The dominant religion in Palestine, Syria, Turkey and North Africa was Christianity. There was a small minority of Jews. The dominant religion in the Persian Empire, consisting mainly of Iran and Iraq, was Zoroastrianism, although there were significant minorities of Christians and Jews.
The dominant religion in the Roman Empire was the Roman religion until Christianity became the dominant religion.
The majority religion in Iran is Shi'ite Islam.
Buddhism is the dominant religion of Vietnam.
The Safavids were responsible for making Twelver Shiite Islam (as opposed to Sunni Islam) the dominant religion of Iran. They were notorious for their belligerent treatment of Sunnis, especially in the western provinces.
The dominant religion of the Cayman Islands is Christianity.
Shia Islam.