It is a Sunni-Alawite war. If you haven't noticed, Alawites have been oppressing Sunnis for a very, very long time.
Assad gets his soldiers nowadays from Alawites, Drafts, and abroad. And the idea of revolution is still strong among many, including most Islamists.
FYI ISIS aren't Islamists.
Just 3 million Alawites in Syria, couple ten thousands of foreigners on the SAA side and they can hold all that territory with Sunni majority population against the locals whom are ~20 million Sunnis ?
Turning the war sectarian didn't benefit you, it only costed you, let's thank figures like Aroor, he must have disappeared as he failed as well.
this reminds me of the so called "حلف المطيبين" when the Mujahedines in Iraq united n declared the ISI back then resolving by it AQ in Iraq .
You remind me of Islamrules, he also wrote 'Mujahedines'.