Trump can't "lose" a Syria that he never had.
The idea that the Kurds must be protected by the USA from Turkey is a geopolitical argument, NOT a moral one. No one wants to see needless bloodshed, but often these conflicts occur along practical pragmatic lines, NOT ideology or morality. According to many sources the Kurds are now set to be aided by the Assad government in Syria in a new regional conflict with Turkey. The neo-conservatives will label this as Trump "losing" the Kurds to Assad and Putin. But did we ever "have" them? The objective of the operation in Syria was the reversal and defeat of ISIS. That was mostly accomplished in 2017 and it's hard to know when if ever terror will be completely eradicated. On the other hand Syria as a nation has been allied with the Soviet Union and then Russia since at least the 1960s. The Soviet naval base in Tartus has been active since 1971. The US ambitions in the region are largely part of the broader movement to keep America closely involved in the Mid