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In contrast with state propaganda that portrays Iran as a Shia nation, only 32% explicitly identified as such, while 5% said they were Sunni Muslim and 3% Sufi Muslim. Another 9% said they were atheists, along with 7% who prefer the label of spirituality. Among the other selected religions, 8% said they were Zoroastrians – which we interpret as a reflection of Persian nationalism and a desire for an alternative to Islam, rather than strict adherence to the Zoroastrian faith – while 1.5% said they were Christian.

Full article >> Iran’s secular shift: new survey reveals huge changes in religious beliefs
Interesting.