For the region, The issues we have here are nothing new. It’s been beset with tribal conflict for thousands of years and every so often, people from western Europe have, for various reasons, religion, territory, oil etc, gone in to ‘sort’ what they perceived to be the problem. Except how does a historically cultural problem get sorted?
Ultimately, fighters gonna fight.
As it stands, it’s a far cry to see a peaceful outcome. The real danger will be, although IMHO unlikely, that IS manage to unite the Arab states against the rest of the non Muslim world.
I’ve tried to think of a solution, but we’re talking ideology here and we all know how difficult it can be to persuade someone otherwise.