My solution for this would be to back the Syrian government and when the war is over, arrest/kill Assad for gassing his people.
Do you actually believe that story that Assad gassed his people? That lie was part of our trumped up justification for destabilizing and overthrowing the legitimate government of Syria. And it didn't make any sense, because Assad had no motive to do such a thing - and every motive not to. What did make sense was a false flag gas attack by Western-backed rebels on their own people to gain sympathy for themselves and condemnation of Assad. Madison Avenue has nothing on the war propagandists.