It's now officially acknowledged that what's going on in Syria is a religious / sectarian war. In fact, there is sectarianism within the Salafists themselves. An example (quoting a report from a link in Tumblr), a radio exchange was caught at the ground recently, earlier this year, between two foreign fighters in Syria. The first from Al-Qaeda's ISIS (Islamic State in Iraq and Syria), and the second from the FSA (Free Syrian Army).
The religious propulsion of foreign fighters who have flooded into Syria in the last three years — 400 or more from Britain alone — is beyond doubt. From the outset this has been a confrontation inflamed by religious sectarianism.
Quite obviously, sectarianism between Al-Qaeda and FSA is now being used as a force for providing an incentive to Al-Qaeda fighters by their leaders for occupying Syria and kicking out not just President Assad but also the SNC and its fighters.