This assumes the al qaeda led rebels didn’t launch their own chemical attack on their own people to blame Assad.
We don’t know.
They train their own people to blow themselves up. They put women and children in harm’s way to blame their deaths on Israel. There isn’t any tactic beneath them.
“We dont know.”
The “rebels” have become a conglomeration of various factions.
The enemy of my enemy is my friend
I do not think the people murdered were necessarily the rebels ‘own people’. Many of the rebel factions aren’t even from Syria. Plus the main General that had defected has-if I remember correctly-been killed recently.