ISIS can essentially never be stopped

ISIS will never be stopped.  No matter how many airstrikes we send and no matter how many Syrians we train.  I do believe that military intervention is necessary and will impede their efforts, ISIS will never be 100% gone.  The ones who are involved in this group are indeed Sunni extremists with a passion and nothing to lose.  Their texts state that if they die for their cause, they will be rewarded greatly in the next life.  "The Qur'an does also mention that those who fight in the way of Allah (jihad) and get killed will be given a "great reward",and there are also hasan (good) hadith which refer to 72 virgins as one of the "seven blessings from Allah" to the martyr. This has lead to the 72 virgins concept being widely used as a way to entice other Muslims into carrying out "martyrdom operations" for Islam."  We are dealing with a group of religious extremists that are willing to kill themselves for a cause,for an example, the roots of the 9/11 attack.  Especially if religion is involved, which it is 99% of the time, their cause and reasons will never never die out.  ISIS can be compared to other terror groups, like the Taliban, in how they just "pop up" around the middle east.  You kill one kingpin, another pops up.  You kill one "clan", another crawls out from nowhere.  Military intervention will keep them at bay, but ISIS, i believe, will always exist and will never completely dissolve.