Now we can get into a pat argument about whether it's about religion, or land, or power. That doesn't particularly matter either. ISIL won't last more than a few years, but there will be another group to follow it. There's no doubt about that. It's one of the common things about people who think they know what is best for you. They just don't stop.
True, maybe once there is a stable government solution is not topple it. People tend not to like getting their families and friends killed. And such people not have much to lose.