I can go along with funneling arms to Syria and wishing to keep quiet about it, not that the Russians wouldn’t find out and tell all. But to sacrifice a high ranking official? I also can’t see a strong connection with the resignation of the CIA chief. If deception is one of the tools of their trade, wouldn’t denying any involvement be fairly routine? And sacrificing yet another highly regarded professional? That’s a big price to pay and a huge gamble IMO that it wouldn’t come out anyway.
More important I believe is the lack of support for the Syrian cause. We are led to believe this is due to the complex mix of elements involved. When has that stopped the US in the past? And if it is the case, then the fact the US is using its enemy (as the above suggests), would be fanning the flames they appear so eager to avoid doing? I think the key here is probably Iran, and a confrontation the US doesn’t want right now.