I am not advocating for "boots on the ground" or ratcheting up the war, just pointing out that so long as this low-level conflict festers in the region, the refugee crises will continue unabated.
Europeans love to play the safe game of sitting on the sidelines, watching America make mistakes (and we've made a lot) and then smugly saying, "I told you so!" when it goes wrong. When it goes right, of course, no one gives us accolades. And it goes without saying that while Europe will offer criticism, they rarely will offer to participate in any significant amount.
Over the years, we've stood by as one dictator after another was toppled, only to be replaced by an even worse sort of government - or no government at all. In retrospect, are the excesses of the Shah any worse than the excesses of the current Iranian regime? A government that marched children across mine fields to clear them? A government than hangs people from tow trucks for even petty crimes? All we've done is trade one horrific form of government which was stable for another horrific form of government that isn't.
You don't want to move to States that have work requirements for food stamps - they will make you get a job! And oddly enough, in States where the work requirement was re-enacted, the number of people working increased and the number collecting food stamps (and amount) went down.
But it is too late to unwind that mess. When it came to Syria, we supported "rebels" trying to overthrow the government without really understanding who these rebels were. They were not a homogeneous group, and they were quickly infiltrated and overrun by religious fanatics and folks with an economic and military agenda. Years later, hundreds of thousands killed, millions more as refugees, entire cities destroyed, and the best available option seems to be to put the mean old dictator back into power.