I've summarised below why none of the military reasons offered by Cameron to justify a mini-air campaign hold water; even his 70,000 imaginary friends were trashed by readers of the Speccie when Cameron's Salafist-loving chum Charles Lister popped up there to bolster Cameron's spurious and improbable claims made on the floor of the House.
However, despite the total lack of any military justification for air sorties into Syria, I think we ought to agree Cameron's proposal, for all the right reasons outlined by Fraser Nelson. As long as those directing the sorties resist any change of direction from Cameron towards the Syrian government - who together with the Kurds are the only reliable sources of 'boots on the ground' - it won't hurt. Sure, it will put ordinary people in the UK at increased risk from ISIS, but since we're at 85deg anyway raising the heat to 90deg is a reasonable risk for us to take in return for our place on the allied team.
One question now becoming increasingly relevent is Osborne's attitude to the primitive Salafist savages in Saudi Arabia and to Islamist mafia don Erdogan. Cameron's obtuseness and muddle-headedness on who his chums are will cease to be of relevance before the next election. The real question is what approach will Osborne take to Dave's Saudi chums?