Basically, it requires the US to screw its allies in the fight against the Islamic State. Which would not be out of character for Trump, since Kurds cannot “pay him for protection”. The protection was based on principles (the Autonomous Administration of North-Eastern Syria was the only player in the region that tried sticking to democracy and human rights) and a common enemy (ISIS).

The US using and abandoning Kurdish people is a repeated pattern long since before Trump. Heck, the US helped Saddam Hussein massacre thousands of Kurdish people in Iraq in the deadliest nerve gas attack in recorded history.

https://en.wikipedia.org/wiki/Halabja_massacre
https://en.wikipedia.org/wiki/United_States_support_for_Iraq_during_the_Iran–Iraq_War

Also the DAANES you mention as “trying to stick to democracy and human rights” runs torture camps and mass executions and the US helps funnel new people into them.

https://www.amnesty.org/en/latest/news/2024/04/syria-mass-death-torture-and-other-violations-against-people-detained-in-aftermath-of-islamic-state-defeat-new-report/