With the beheadings and public executions, it might seem that ISIS is the worst thing to happen to Iraq in a while.
But that isn’t the case, says the former head of the CIA.
Gen. David Petraeus, who led U.S. troops in Iraq during the surge in 2007-2008, said that Iran-backed Shiite militias are a greater threat to Iraq’s stability than ISIS, known the Islamic State in Iraq and Syria. Currently, Shiite militias are fighting ISIS in several parts of the war-torn country.





