Many Iraqis believe that without Iranian intervention in Iraq, both directly and indirectly through former Premier Nouri al-Maliki, there would've been no IS to start with. Iraq had never been torn by sectarian feuds, although it suffered from ethnic conflicts between Arabs and Kurds. It was Khomeinism, a particularly obscurantist form of Shi'ism, that injected a high dose of sectarianism into Iraqi politics.

Battle of Tikrit's lessons for Obama, New York Post (March 29, 2015).