no different in Europe or any other place. war is war
Name one other place that has been at war more in the last 5000 years than the holy lands. It has everything you need for war. Ancient feuds, holy sites with overlapping claims, justification to dehumanize the enemy. War is war, but when it keeps happening in the same place there is probably a reason why.
To the outside world, they tut-tut ISIS crimes, but also look the other way when it comes to putting the squeeze on them. If they (governments in the ME) can't put this down, there should just be a cordon put up at some point around the affected areas and then go nuclear on everything inside the cordon.
And they can do it quite easily. Between just the Islamic countries in the region they combine for millions of troops compared to tens of thousands members of ISIS. ISIS could be the force that brings about cooperation between them but it is easier to let the west do it, pay for it, and take the fall out in the form of terrorism.