So it's a version of Islamic "anti-religious everything that isn't Islam fascism", totalitarianism, or whatever other word you would prefer to use. So what if it's a made up word? Does that really matter other than semantically? Would it be Islamist or Islamics? I know what their goals, unstated or stated, are for the world at large. Which is exactly why we need to squash this movement with extreme prejudice. Peace through superior firepower. A great Briton understood this "movement" -- Winston Churchill and we are suffering for not listening to him then.
How about "Islam?" I object to labelling everything we dislike "fascist," because it is a trick started by the Commies, for Commie reasons. By perpetuating it, we implicitly endorse the view that fascism was worse than Communism, even though Communism had a much higher body count.