The muslim Brotherhood, of course. Gotta hurry and get the Caliphate up and running and Assad is in the way.
After Assad is deposed it will turn out that it was the rebels who used the chemical weapons. Fighters have arrived from all over Europe, North Africa and Central Asia to overthrow Assad. How can such an unpopular dictator survive an attack supported throughout the West for so long? Assad will be looked back on with fondness after the fundamental transformation of the Middle East. Thank you President Obama, John McCain and Hayseed Graham.