Chlorine gas is a element anyone can make with the products found underneath the kitchen sink if your stupid enough. It doesn’t take a lab... Even a Syrian rebel could do it.
It doesn’t point to Adssaid.
My opinion...If the rebels had done this, they would not hit civilians...They’d go after Syrian military...
If Assad did this, he did it for the purpose of keeping people under his thumb...He’d be following along the lines of many other dictators we have seen all around the world...