A short history of the region we now call Syria, as I understand it.
1. The Majority Sunni Muslims have dominated/ruled the region containing Syria, almost exclusively, since the founding of Islam; apx 1400 years.
2. In 1945 there were only 45 documented Alawite Shia living in Damascus.
3. The French and then British set the stage for the minority Alawite Shia to rise to power post WW1.
4. Assad's daddy took power in 1970. So out of 1400 plus years the minority Alawite Shia have been in power for only 43 years.
5. If history is any indicator of future events then the minority Alawites will be forced out of power shortly. The Sunnis will dominate once again and the Alawite Shia will join the other Syrian minorities (Druze, Christians, and Kurds) in Syrian obscurity once again.
6. Conclusion; The Rebel Sunnis are going to win hands down, Assad and his Shia boys are toast, even without our help.