ISIS are a bit different to Hamas and the other Palestinian groups. Rather than have a specific target, Israel, to act against, ISIS are a concept whose central point of existence is nihilism in the name of their interpretation of Islam. Disparate Islamic terror groups around the World will swear allegiance to IS without forming part of a coherent campaign; as well as the rump that is still active in the Middle East, there is a large region of sub-Saharan Africa that is plagued with IS affiliates, there are also groups in places like Indonesia and the Phillipines.