...Daesh (ISIL/ISIS as they like to be known) are completely different from basically any other terrorist movement we've encountered. Their goal is a global Caliphate, powered by a pretty twisted literal interpretation of Islam. They aren't after self determination, or any of those "normal" terrorist movements. They are literally after the end of secular civilisation as we know it.
And the chilling thing is that all that stands between us and global catastrophe is that they don't have access to the technology to do it. In that respect it is worse than the cold war as then people at least had the hope people wouldn't be suicidal enough to actually push the button.