(A Sunni Muslim imam from the Liwa al-Tawhid rebel group talks to his comrades in Aleppo in September.) In “The Next Breeding Ground for Global Jihad,” former CIA operative Reuel Marc Gerecht writes for the Wall Street Journal, October 7, 2013, thatby “doing nothing” about Syria’s civil war and thereby worsening Syria’s descent into chaos, President Obama and Congress “may have already done their part to create the most deadly Islamic movement since the Taliban merged with al Qaeda in the 1990s.” Gerecht explains: Social order in the Muslim world depends, as it so often does elsewhere, on older men...