To defeat Isis you will have to wash your hands in blood, they embed themselves in civilian areas so no matter how careful, you cannot help but kill innocents, it is part of their strategy, as it gains them recruits horrifies the west and is demoralising on westen soldiers.
These guys are middle eastern nazis, the only way to defeat them is by wiping the fuckers out, end of! There is no pretty, sanitised, clean way to do this, Isis have created a devils alternative so no matter what you do, innocent people will die, but the longer they are left, the more people will die and be raped and tortured by their nazi regime.
These scum only respect and believe in might equals right, that illusion of final victory needs to be taken from them. And people with religious sensitivities need to be TOLD, to fuck off and if people mock your faith turn the other god damned cheek like normal human being and ignore it, and anyone who preaches hate is fucking deported or jailed.
In conclussion, to defeat a nazi ideology today, you have to do today what people did before! You dont send a rapid dog away, you dont tie it up, you put it fucking down!