Re: "wake of a chemical weapons attack on civilians"
On the planet of unproven allegations.
The correct response by Trump and Nato would have been to put a small team of boots on the ground, collect irrefutable evidence, dare Assad to try to bomb while it is being done and work based on irrefutable evidence. If the evidence was right, Russia would have had no choice but to back off from protecting him.
Hard to do? Not really - there are US special forces in Syria already, there are advisors from other countries too. Probably in the neighbouring village - Turkish tanks are like an hour drive from Idlib inside Syrian territory and some of the forces in question are there today.
So, instead of that what do we get: amateurs collecting unverified soil samples and fragments from something which is unclear what it is. So if that was Assad, we just lost the perfect opportunity to get his head on a plate as he violated the 2013 agreement.
The important thing here is "if". There has been a multiple number of occasions when rebel fractions have lobbed weapons (including chlorine) at each other in parallel with Assad and Russian bombing runs in order to "combine the pleasant with the useful" - kill a few of the "wrong shade of black" and get the International community to react in horror at how nasty the common enemy is. If Assad did it, then a "scraped bottom of the barrel" selection of Chlorine, Zarin and several other chemicals would have been less likely.
The sad part is that we will neither know, nor be able to properly bring Assad (if it was him) to justice for this now. All of this because of a trigger happy idiot orange baboon and a totally screwed up first response (suspiciously inadequate in fact).