Ribit:
There are more important things on Obama's agenda than defeating ISIS.
Israel has already ordered him to get rid of Assad and get Iraq broken into three sub-countries or tribal areas; one Shiite, one Sunni, and one Kurdish. ISIS may be needed to defeat Assad and establish a Sunni zone in Iraq. Lebanon and Palestine have to be screwed some more before Israel decides what Obama will do about Iran.
Israel's goals are much more important than America's goals.