Shaken by a failed coup attempt, Turkey’s government and many of its citizens are desperate for someone to blame.

Instead of undertaking a thorough investigation of the facts, though, they have accused the United States of complicity in the insurrection. This has ignited a new wave of anti-Americanism that, combined with a sweeping government crackdown against enemies real and imagined, poses a serious risk to NATO, relations with the United States and Turkey’s long-term stability….

When Gen. Joseph Votel, the top American commander in the Middle East, told a security conference last week of his concerns about the effect of the purge on Turkish officers, including some who worked with the Americans and are now jailed, Mr. Erdogan faulted him for taking “the side of the coup plotters.” On Tuesday, Mr. Erdogan kept at it, giving a speech in which he said that in standing by the putschists, the West supported “terrorism….”

While it is understandable that the Turks are rattled by the coup attempt, in which Mr. Erdogan said 237 people died, they are playing a duplicitous and cynical game. Mr. Erdogan has faulted Western nations for not condemning the coup firmly enough, but his real beef seems to be that they have expressed alarm over his use of the crisis to purge some 66,000 people from the military, government ministries, schools and universities. That is far more than could possibly be justified, and so sweeping as to radically upend the character and competency of those institutions….

Over the long term, the United States and NATO have a more profound problem on their hands: What to do with a vital ally that is veering far from democratic norms? American officials say they have begun to study options, including whether NATO might one day have to decide on some kind of consequences, so far unspecified, for antidemocratic behavior.

Even the mention of possible action by NATO would be likely to infuriate Mr. Erdogan. But it is hard to see how Turkey can be a trusted ally if it embraces principles and practices so at odds with the West, or how the country can ensure its own continued development and security without NATO as an anchor.

Image: Turkey’s President Recep Tayyip Erdogan, July 29, 2016 (photo: Office of the President of Turkey)