Take away the pop culture reference and kind of, yeah.
The US changes regimes every 4 to 8 years, more or less. It also divides power between co-equal branches. And while the executive branch has the responsibility for negotiating agreements, it doesn't have binding authority to ratify those agreements. US policy is subject to wild swings, and unfulfilled commitments, with each new president and the shifting moods of Congress. Many a counterparty has found their state of play changing dramatically, from one president to the next.
I don't understand why anybody would expect any consistency from the US, president to president, absent an act of Congress. And therefore I don't understand why anybody would be so completely shocked -
shocked! - to discover a lack of consistency from Obama to Trump.
You wish some other Republican had been elected, instead of Trump? They would have reversed some of their predecessor's policies, too. Maybe the Kurds would have been spared, and somebody else gotten the shaft, if it had been President (Jeb) Bush instead. But nobody should have been surprised. Just like nobody should have been surprised when Obama reversed some of (W) Bush's policies.
But I'm pretty sure the Kurds understood they were negotiating with a scorpion. I'm pretty sure that, living in that region, they understand that all their counterparties are scorpions. And unless the Kurds have no sense of history, they must have already figured out that US policy in the Middle East is very swingy, and is just as likely to screw them over as it is to help them out.
And that's not even considering wild policy swings during a single presidency, which also happens.