This is worth a listen (Its the 'One phrase from a Saudi Cleric' episode)
https://itunes.apple.com/ca/podcast/...=2&i=357459685
Basically...ISIS is Al-Queda 5.0...it can't be bombed into surrender...the ONLY thing that will defeat ISIS (and Al-queda 6.0 etc) is for the Islamic world to view their effort as anti-Muslim thereby removing their legitimacy. Everything else is just damage control...