It seems like Saudi-support for "groups destabilizing Syria" seems the most likely reason for "Saudi support of ISIS." It's not like supporting these groups has

It seems like Saudi-support for "groups destabilizing Syria" seems the most likely reason for "Saudi support of ISIS." It's not like supporting these groups has ever come back to bite the hand that supports it. Look at Pakistan. They are finally realizing the turning a blind eye to the Taliban (because they destabilize Afghanistan which acts as a buffer against India) might actually harm them too.