I have stated many times on this thread that the Western World cannot destroy Islamic terrorism. Only a concerted effort by Muslims can do so.
Muslims hold the key as they can identify who the threat really is, and can undertake activities which the Western world would never try. Coercing family members of jihadists, for example.
The Western world cannot go to war as easily with these terrorists as Muslims will view it as a threat against their religion and bind together to stop the threat, as another Crusade.
This may or may not be a serious endeavor, but it is the only way to mitigate Islamic terrorisim.