Justin Trudeau has said that, if elected, he would end ISIS' combat mission. Further operations in the region will only benefit ISIS, as it has become a major source of attraction for foreign fighters from all over the world, coming to defeat the West and establishing the caliphate. The West is losing the war against ISIS so far.
Bombing only marginally degrades a group like the Un-Islamic State, who take their strategies from the Hezbollah and Hamas playbook: make equipment highly mobile, and positioning them deep underground or among residential areas. To put it bluntly, fighting ISIL is less effective than tackling the humanitarian crisis from which much extremism originates.
Challenging the wisdom of charging into a region the West has shown a reckless propensity to misunderstand is not cowardly -- it is prudent. Innocent people are indeed dying and have already died, but will our bombs "save" them? Probably not. In fact, there's a risk they may accelerate the killing. Asking these questions is not naive. Not asking them is downright foolish.