From what I understand of these ISIS savages, their cruelty would make even the SS Totenkopf (for those who are unaware, they were the specific branch of the SS who ran the concentration camps, IIRC.) And like
Quintium said back on page 1:
"This Islamic State will eventually fall, because even with birth rates that will cause the population in the area to double within one generation there won't be enough manpower at some point in the not too distant future. But in that same future, it'll be tried over and over again, in the Middle East and elsewhere (similar groups exist in South Asia, South-East Asia and Europe but don't have the 'critical mass' yet). This is just one of many - it will be defeated militarily, but it will live on in the hearts and minds of millions and millions of people the world over, and that is the real threat."
So if we not only want to end ISIS, but end everything they represent and end Islamic Totalitarianism once and for all, we must approach this threat the same way we approached the threat of Shintoism in 1945. We must first identify Islamic Totalitarianism as the political threat facing the West, then direct American (or whichever nation you're from) resources towards ending the political imposition of Islamic Law, beginning with the Islamic State of Iran, along with any state that provides funding to these barbarian trash. By identifying the advocates of political Islam – those who would impose Islamic Law by force – as the true enemy, Americans (or any civilized people, for that matter.) could destroy its state manifestation wherever it appears, and then offer an intellectual alternative to jihad. This is the only way to end the threat posed by Islamic Totalitarianism, and to re-establish a proper basis for freedom across the globe. It must be decisive, it must be memorable, it may even have to be cruel in order to get through to them. Though I honestly hope the latter isn't necessary, though I'm not gonna hold my breath on that.