Do the United States of Obama even have a Foreign Policy?
Ideology prevails, rather than the national interests of the United States.
Ideology has prevailed in Syria and likely will in Iran and elsewhere.
It's all a big clusterdunk.
The following article from Stratfor provides a good summary of what President Obama's America did and did not do about Syria. As it contends, the concept of Weapons of Mass Destruction (WMDs) has deteriorated over the years.