So my question is do we really know which faction of the 15 is least repugnant? And if so,which one is it?
Assad is a secular Muslim dictator. The people wanting to overthrow him are Islamists that hate Christians. As bad as Saddam was, Iraq had a large population of Christians that lived safely there until we got rid of him and gave them democracy, which in that part of the world means Islamists who, while fighting and killing each other’s factions, together hate and kill Christians.
What Christians? There are none left to kill.