cofty - Sooner or later, in some form, with the same objectives and tactics - yes.
I would have to agree. It wouldn't exist in the same form as ISIS does today; nonetheless, Qu'ran encourages—not only allows—such possibility of holy war, and I strongly believe that sooner or later some fundamentalist followers would create an organisation similar to a degree.
Obviously, I am not saying that all or even most Muslims would embrace violence against non-Muslims. I am pointing out the fact that within every single religion there are fundamentalists who go to extremes, even if they are a minority.