Now really... this "gas" thing is getting really old. And it's been proven wrong so many times, and each and every time the strongest possible leads end up pointing right back at the extremists. What is a few dozens of useless women and children (notice how it is very rarely that the fighters are among the victims) when there is a good chance it'll summon some serious firepower from the US and "international community"? No one in their right mind would believe that Assad would risk snatching defeat from the jaws of victory just because he's really into gassing people publicly. Whoever buys this crap is idiotic in the extreme.
It's getting to the stage that nobody believes this anti-Russian stuff any more. Look at the Skripal business. It looks as if that was done by an EU asset in Porton Down, and that why it was done so badly.