Of course there isn’t. What would Assad hope to gain by doing so? Why would he do that when that invites other players against him to help the jihad against him?
His daddy leveled a city in Syria just because its inhabitants were against him
“Of course there isn’t. What would Assad hope to gain by doing so? Why would he do that when that invites other players against him to help the jihad against him?”
https://en.wikipedia.org/wiki/2018_Douma_chemical_attack
“Aftermath[edit]
The day after the alleged chemical attack, all rebels controlling Douma agreed to a deal with the government to surrender the area.[36]