There is a method to their barbarism.
The Islamic State’s barbaric murder of Lieutenant Mouath al-Kasaebeh, the Jordanian air-force pilot the jihadists captured late last year, has naturally given rise to questions about the group’s objectives. Charles Krauthammer argues (here and here) that the Islamic State is trying to draw Jordan into a land war in Syria. It is no doubt correct that the terrorist group would like to destabilize Jordan — indeed, it is destabilizing Jordan. Its immediate aim, however, is more modest and attainable. The Islamic State wants to break up President Obama’s much trumpeted Islamic-American coalition.
As the administration proudly announced back in September, Jordan joined the U.S. coalition, along with the United Arab Emirates, Saudi Arabia, Bahrain, and Qatar. The only potential value of the coalition is symbolic: It has enabled the president to claim that Muslim countries were lining up with us against the Islamic State. Militarily, the coalition is of little use. These countries cannot defeat the Islamic State.