I smell a rat.
Assad's regime was, slowly but surely, winning this war. Certainly, their means of doing so are/were brutal in the extreme, but they we're definitely re-asserting in a big way, and the use of chemical weapons would therefore be just-about the stupidest strategic decision possible; their deployment almost certain to cause an escalation from beyond Syria's borders.
Why would the Assad regime do this?
They were clearly in the ascendency, and had managed to contain - more through luck of geography than judgement - the conflict to within their own country. They also had the implicit support of both Russia and China, which restricted any Western sabre-rattling to just that.
To deploy CWs last week is just wholly counter-intuitive to what was in their best interest.
Assad will eventually go down for other heinous crimes; answering either to a War Crimes court or his maker - whatever comes first. But I worry that there is a rush to judgement on the part of (mainly) Western nations, insofar as who used these weapons, is concerned. The West won't benefit from getting this wrong - indeed, if CW is in the hands of some of the more renegade elements of the Opposition, then it is very bad news indeed.
It's disappointing that, once again, some politicians come to a judgement based on pre-conceived notions, rather than a dispassionate assessment of the evidence.
Better that we let the UN inspectors find-out what they can, and then decide what the best course-of-action is, because we could very-quickly see a vacuum in Syria, filled with something even more odious than the Assad regime.