Analysis of information sources in references of the Wikipedia article "Safavid conversion of Iran to Shia Islam" in English language version.
Shah Ismail pursued a relentless campaign of forced conversion of the majority Sunni population in Iran to (Twelver) Shia Islam...
Shah persecuted the philosophers, mystics, and Sufis who had been promoted by his grandfather, and unleashed fanatical campaigns of forcible conversion on Sunnis, Jews, Christians and other religious minorities
Forced conversion in the Safavid Empire made Persia for the first time dominantly Shia and left a lasting mark: Persia, now Iran, has been dominantly Shia ever since, and for centuries the only country to have a ruling Shia majority.