Well of course they are. It probably escaped their notice that this marks the latest in a long line of US Presidents who have ordered airstrikes against or invasions of Middle Eastern countries going back several decades. In fact we've been lobbing Tomahawk missiles into the region for almost the entire time they (the missiles, not the countries) have been in existence.
It's in the nature of Tomahawk missiles that they will be used regardless of their effectiveness.
Back in the day, a king who went to war actually
went to war - he was expected to lead his forces on the battlefield, and failure to do so would get him deposed by someone who could display the requisite testicular fortitude to be deserving of the throne.
As weapons systems and communications systems improved, a ruler could take less direct responsibility for the outcome of a battle - losing no longer meant the likely death or imprisonment (and subsequent execution) of the losing king, so going to war became an easier choice. Still, if a ruler got enough of his army killed in battle, he faced the risk of the dead soldier's families revolting, and throwing him out of office (and perhaps stringing him up from a lamppost).
But now we have sufficiently advanced weapons (and a sufficiently asymmetrical power balance) that ending a war is simply no longer necessary. Why bother to seek peace, when nobody on your side is dying? Tomahawk missiles certainly have their fanboys; But nobody is going to weep at their funerals, nor demand that the ruler makes peace so that no more brave missiles are forced to sacrifice themselves for their country.
Pilot-less missiles and aircraft are the ideal weapons of perpetual war - they can be used to prevent your enemies from developing similar means to strike back at you; and they can be used with effectively no risk at all to anyone on your side in the conflict (although the victims of 'friendly fire' incidents may have cause for posthumous disagreement with that assessment).
Seeking peace because it's the right thing to do has never been popular. Rulers seek peace because their citizens (whether military or civilian) are being hurt; Or because they themselves are at risk. But when you can kill your opponents from a distance with no risk to your own side, where's the motive to even win? Winning is a good way to end a war; But when ending the war is not a priority, why worry that your strategy is not effective at achieving that objective? It's not clear what 'winning' in the Middle East would even entail; But it is clear that the US isn't going to 'lose' - and that the risk to American lives (even those of active duty servicemen) is minimal, as long as the war is carried out at a distance.
Putting boots on the ground might increase the chances of winning; and it might shorten the war - but neither of these objectives is sufficiently imperative to justify the risk to soldiers' lives (and hence to the POTUS's popularity) that striving for either or both would entail.
The only recourse that the targets of these drones and missiles have are terrorism (which has basically failed to have any real impact on America; Despite the hype, American police kill more Americans than terrorists do); or enlisting the help of an ally with the ability to actually strike effectively at American targets (either in the Middle East or in the US homeland). The only nations that have sufficient military clout to do this are Russia and perhaps China. I very much hope that we are not about to find out what happens when a nation that has thought itself invulnerable for several decades, finally provokes a retaliation from a force that has the power to reach them.
America has a fundamental belief that she is, and more importantly
should be, immune from the horrors of war; And like all fundamentalist beliefs, proof that it is flawed will often meet with a psychotic and disproportionately violent response.