ON THE OTHER HAND, WHY WASTE A PRETEXT?:

Advocates of intervention in Syria worry that a failure to act will embolden U.S. adversaries around the world. But if Kim Jong Un is trying to figure out whether or not the United States would defend South Korea, he will notice that Washington and Seoul have been allies for more than six decades, and that with the rise of China, the United States is increasing its focus on East Asia.  The notion that Kim would interpret U.S. reluctance to stop a humanitarian disaster in Syria as a green light to conquer a major U.S. ally strains credulity.

Similarly, leaders in Tehran assessing U.S. threats to strike their nuclear facilities will weigh America's clear interest in nuclear nonproliferation against the real limitations of airstrikes against Iran's deeply buried nuclear facilities. American reluctance to support various extremist rebels in Syria is unlikely to enter into Iran's calculus.

As the civil war in Syria unfolds, the United States may eventually decide to intervene. U.S. officials and foreign policy analysts might make the case (which we disagree with) to join the fighting in order to stop the humanitarian disaster, to contain regional instability, or to secure U.S. influence with the post-Assad Syrian government. But the case for U.S. military intervention should not rest on a bogus theory about signaling resolve to Khamenei and Kim.  American credibility lies elsewhere.

Follow @brothersjudd