The United States should offer sustained military support to friendly forces that fight the Islamic State, beginning with the Kurds and including moderate Syrian rebels and Iraqi Sunni tribesmen. It should seek to erode the Islamic State’s military power as much as possible with airstrikes. It should not press for a new Iraqi government unless Shiite leaders and their Iranian sponsors agree to a fundamental restructuring of power. And it should forge a political and diplomatic strategy that encompasses both Iraq and Syria and their interrelated conflicts. The primary aim should not be to minimize U.S. involvement — as Mr. Obama would have it — but to defeat the forces that are destroying the region.
So, yeah, do that!