Not contesting that Obama wasn't covertly a match to the volatile, civil uprising against Assad eventually (as Obama was an instigator of the infamous Arab Spring generally) . . .
The Arab Spring started in Tunisia and Obama had nothing to do with it -- it was more a matter of Tunisians demanding a change in government and other Arabs going, "Wait, you can do that?!" If any POTUS bears any blame it's W, for starting the Iraq War that generally destabilized the whole region.