We have abandoned another ally. And Trump is getting the blame.
For those who are unaware, Kurds in Syria have taken control of land in Syria as part of the Syrian civil war. Once Unislamic State rose, they were important allies in defeating the inhumane barbarians that perverted the name of Islam. We, in the west, despite not trying to end the Syrian Civil War with direct military force, aided the Kurds through airstrikes, volunteers and troops on the ground.
However, our support for them was going to end once Russia sent troops into Syria. The continued presence of forces from the West in Syria otherwise risked a direct confrontation with Russian forces. If Syria decided to take back control of the land controlled by the Kurds, the odds are that they would do so with Russian help. Turkey was never going to be keen on Kurds creating a state next to the Turkish border, but could not do much while we in the west backed them. So all they had to do was wait.
Now we have left, the Turkish armed forces are free to eliminate what they consider a threat to Turkey.
But while we were going to have to abandon them, the justification of President Trump to explain this is bizarre, will antagonise Muslims across the globe, and will mean that even less people will trust the US, and possibly the rest of the West when it comes to similar issues in the future.