"I'm not sure that it will get better or worse as ISIS's dream of a fundamentalist Islamic state or caliphate in Syria is destroyed."

I don't know either, but there are sound reasons why it won't get better.

First is the "root cause," as some term it. That cause is a century or more of western imperialism in Muslim lands, backed up by overt military invasions by western forces over the last 20 years. Mainstream Muslim citizens are at best politically oppressed by regimes that the West supports, or at worst killed by our soldiers and bombs when the West wants regime change. Needless to say, many innocent Muslims suffer.

That's the political reality, and it won't change one iota with the demise of Islamic State. Islamic State, as did al Qaeda before it, simply taps into the intense dissatisfaction that Muslims in the region have over the status quo. A new version of Islamic State will arise unless the West changes its behavior in the region.