This may be true. But my question is about the delivery systems: missiles, planes, long-range heavy artillery. If you think the opponents of Assad are also using chemical weapons - how would they be using them?
My guess is Qatar and the Saudis. But that is irrelevant to the question of how people with AK47 and some old Soviet tanks can use chemical weapons. For Assad's army with missiles, fighter jets and heavy artillery it is pretty clear.