Religion in Iraq
Islam is the official state religion in the Republic of Iraq, but the constitution guarantees freedom of religion. Iraq is a multi ethnic and multi religious country with Islam, Christianity, Yazdanism, Zoroastrianism, Shabakism, Judaism, Mandaeism, Bahā'i, Ahl-e Haqq-Yarsanis, Ishikism and numerous other religions all having a presence in the country. Shia Islam is the main religion in Iraq followed by 60–65% of the population, while Sunni Islam is followed by 32–37% of the people. Many cities throughout Iraq have been areas of historical prominence for both Shia and Sunni Muslims, including Najaf, Karbala, Baghdad and Samarra.
Baghdad
As early as 2003, about 20 percent of the population of the city was the result of mixed marriages between Shi'ites and Sunnis: they are often referred to as "Sushis". Following the sectarian violence in Iraq between the Sunni and Shia militia groups during the U.S. occupation of Iraq, the city's population became overwhelmingly Shia. Despite the government's promise to resettle Sunnis displaced by the violence, little has been done to bring this about. The Iraqi Civil War following ISIS' invasion in 2014 caused hundreds of thousands of Iraqi internally displaced people to flee to the city. The city currently has Sunni, Shia, Assyrian/Chaldean/Syriacs, Armenians and mixed neighborhoods.