Far from a "Vote of Shame", Parliament got it right in 2013. The proposed action was utterly pointless. As Lord Richards wisely stated on Today this morning, the only force on the ground in Syria that is sufficiently large and disciplined to defeat the extremists is Assad's army. That much was blindingly obvious two years ago, probably even (privately) to those who had to stick publicly to their governmental lines on training of "moderate" rebels. The doggedness with which the US and UK governments stick to the Saudi line on Assad appals me.
I think the country, and most likely Parliament, would be behind Cameron if he softened his stance on Assad and made ISIL the clear focus of any new vote on Syria.