While I may or may not agree with the propriety of this strike, you cannot say that there is no evidence since you have zero idea what those privy to the intelligence know. You could be right, but I seriously doubt it.
The Russians contend the British intelligence worked with the jihadists to shoot fake videos of a fake chemical attack.
British intelligence brings us back to people like Christopher Steele who worked to undermine Trump with the dossier.
I would just like to say that I do not believe a damn thing our Intelligence Community(IC) says. We have been lied far too often by our IC.