I'd say it sounds like you've just been woken from a deep, addled sleep but I hate discovering I've been presumptuous. In any case, yes, Trump was highly critical of B. Obama's and H. Clinton's proxy warmongering in Syria before he supported it. You really didn't know? And yes, in our* crazed lust for never ending military adventure we have been trying to provoke Russia via Syria for many a year now. Add N. Korea, Iran, Yemen... Trump appears quite eager for more involvement in just about any war these days to distract everyone from Mueller's activities. However, I think he's just begun adapting to his core belief structure. Fascist neo-liberalism. Appears yours likely as well. Thus the * on "our". Sure as hell didn't mean "my".What about face? Have we gone to war with Syria yet?
He's been reacting to heavy pressure from both sides of the aisle.
THis is not what he ran on, it is not what his base wants.
Imo, in the absence of pressure for military action, or with countervailing pressure to NOT intervene, Trump would be open to pulling out.