The Media coverage makes this worse because ISIS feeds on the Media coverage. perhaps if the media didn't cover it they would lose interest?
At this point, I don't think they'll stop if we ignore them. There's always social media after all.
This is a wrong strategy of burying our heads in the sand. It's also not fair to the victims to pretend like it didn't happen, like they didn't get killed.
Sadly it seems like the only way to deal with this is the complete separation of the Muslim and Christian cultures. The globalism experiment failed, at least when the cultural difference gap is so huge. Maybe we can try it again in the future, but for now it will be best if we take a few steps back and try to return to the times before globalization.
I'm actually advocating the opposite. otrkid70 suggested ISIS might stop if the media stop covering them. Hell, no. They'll do everything to get their message out there, through Twitter and other platforms. They're quite fond of uploading decapitation vids.
So yeah, report about them but also target their communications capability. i believe they do maintain sites where they release instructional magazines, would it be lovely if those sites are targeted to infect downloaders with a virus that would eventually betray their locations?

As for separating, it's too late now. How are you going to get rid of Muslims that are already naturalized in Europe then? That would be close to impossible. I'd rather have the gov't make sure they are well integrated and properly monitored. Unfortunately "assimilation" is a dirty word now.