Assad wants to fight to the bloody end. Why do I oppose Assad? Because he kills people and he represents power. What other reason do I need? I always oppose the powerful, those who are not powerful are not a threat. The purpose of democracy is to reduce the possibility of any one faction getting total power.
For hundreds of years, conflicts in that part of the world have resulted in the deaths of leaders and by his utter intransigence Assad is asking for a return to the behaviors of the past.