 How do you pray?What kind of music do you listen to?After the collapse of the Iraqi army and capture of the city of Mosul by ISIS in June 2014, the "most senior" Shia spiritual leader based in Iraq, the Grand Ayatollah Ali al-Sistani, who had been known as "pacifist" in his attitudes, issued a fatwa calling for jihad against ISIS and its Sunni allies, which was seen by the Shia militias as a "de facto legalization of the militias’ advance".