I find the premise as nonsense.
Why? It presumes more from the Turks than was likely or logical. The Turks were not going to war with the U.S. in Syria over the Kurds. Trump saying no to Erodgan would have meant continuation of the status quo in Northern Syria, not war with Turkey.
That is not an argument pro or con about Trump’s change in policy. It is an argument against the author’s premise about that policy change. We have assets in the region that could simultaneously blunt an Iranian and a Turkish attack. Iran knows it and Erdogan knows it.
It is far fetched to expect actual war with Turkey or Iran, either separately or in concert. Neither of them have a death wish, and Putin is hardly Glenda the Good, but he’s rational. But when contemplating troop repositioning, the first thing you have to assume is that war might break out, and where that would put you. It is a valid and important consideration. Mr. Langfan, I think, is getting carried away with it. But who would have thought 101 years ago that some Serb nationalist would assassinate the crown prince of Austria, and that that would lead to such a terrible, protracted war. Prepare for the worst. Hope for the best.