“Watchful waiting” in Iraq, yes. Help the Kurds a little with defense while letting the other factions fight each other. Action would best be taken in Ukraine to stop communist/fascist expansionism and another Russian buildup there.
It’s often forgotten that al-Qaida proclaimed its own state in Iraq in 2007, but its brutal ways alienated fellow Sunni insurgent groups so completely that they switched to our side. The Islamic State is equally vulnerable to a backlash.
Well, you know, if there IS a viable side to switch to, that can protect you when you switch.