Wahabism as an ideology is truly an evil concept. When an ideology's basis is based on the negative presumption that all muslims need rectifying apart from those that subscribe then the result will be destruction.
Its not about simply the people the kill its about sowing discord, destabilising nations that disagree and even going to the extent of seeking or providing succour to the kuffar the known enemy of islam in order to acheive your nefarious designs.
Br DS a few months ago did a superb analysis on the origins of Wahabism - and it should be the something we should all acquaint ourselves with. Im not bothered with the silly and petty debates that occupy the minds of many barelvis i.e noor and bashar and ilm ul gaib etc these are by the wayside. The more important thing is the way our lives have been effected this last 100 years. The loss of the ottoman caliphate, the supporting of the west against iraq, the supporting of illegitimate takfiri groups against the ordinary people of nations i.e the shia/sufi in Pakistan.
Unless and until we know the origins we can never really authoritively speak against wahabism as a destructive doctrine.
As to why the Qatari and Saudi regime are backing rebellion in Syria it is purely for 2 reasons. Both countries see the shia population in their country a threat. Moreover they see Iran's nuclear ambitions a threat hence they are willing to aid the kuffar to ensure their aims are fullfilled. We shouldnt be surprised as they have always done this.
This does not decry that like all muslim people's the sunni of Syria have genuine grievances - but we should remember that those aiding them arent doing so out of humanitarian desires but own geo-political agenda. Otherwise why hasnt any arab regime spoken out against the 20000 dead in Burma? Why havent they provided any sort of financial help and why havent they used their financial might to force Bangladesh to care for them?
Iran, Hezbollah should have used their diplomacy and wisdom to ensure that Assad didnt let things get out of hand and not allow syria to be destabilised. Instead they accepted it as inevitable and flocked to support the regime thus losing much good will in the muslim world.
Before its too late both the shia but more importantly the majority sunni need to open their hearts, minds and eyes and realise who the snake is. If we remain in slumber the time is not far when there wont be a shia or a sunni we will have been discarded in the dustbin of history.