Syria WMD: Hague 'believes'

William Hague says the odds of the 'rebels' framing the Assad regime are 'vanishingly small'.... wasn't that the odds on not finding WMD in Iraq?  It is not for Assad to prove to the world that he didn't use chemical weapons against innocent civilians in Ghouta as much as it is incumbent upon western leaders to prove to a skeptical public that he did, before doing anything rash. It's tedious to keep hearing it, but the Iraq war was a curse and we got into it via fakery and lies. Skepticism is healthy. Believing is not knowing.

William Hague, the Foreign Secretary, held: “The only possible explanation of what we have been able to see is that it was a chemical attack.
“So we believe this is a chemical attack by the Assad regime on a large scale… It was the only plausible explanation for casualties so intense in such a small area.”
The odds that rebels had staged the attack to “frame” the regime, said the Foreign Secretary, were “vanishingly small”. Link