U.S. can settle for nothing less than the destruction of the Islamic State, but it is unlikely to get much support from either European allies or action from the Arab states
The rise of the Sunni Islamic State (ISIS) and its barbarity may be news to the West, but it is a very old story in the Middle East.
Briefly stated, the Arabs have been at war with one another for some 1,400 years before and since the emergence of Islam and the schism that occurred between its Sunni and Shiite components.