I know I'm repeating myself, :bla-bla: but this is nothing more (nor less) than very, very good politics ~ making a silk purse out of a sow's ear. Justin Trudeau make a silly, downright juvenile remark, over a year ago, in a TV interview, when criticizing Stephen Harper because he, the PM, had decided to "whip out our CF-18s to show how big they are." He, M Trudeau, was, rightfully, excoriated, in even the Liberal friendly media, for both the tone and substance of the remark ... and it wouldn't go away. The campaign team, now the PMO, decided to neutralize it by building a policy around the notion that we could "do better" than bombing. The promise to withdraw the CF-18s was a good one ... for a campaign. It was, also, easy enough to keep.
There are, in my opinion, both a strategic and a moral case to be made for not bombing ISIL, but neither Prime Minister Trudeau nor anyone in his camp has made them.
This policy decision is a direct result of an immature quip tossed off by a poorly prepared candidate ... but he's now our prime minister and getting him to that high office required the quip to be made into a promise which has, now, been translated into policy. That's all there is; there was no need for policy or diplomatic or military input; this was done, entirely, within the domain of the "spin doctors."