The big trouble with letting this sort of thing carry on is that eventually it spills over outside their own borders, already happening with refugees.
On the question of intervention the answer has to be a big fat no, unless you go in and deal with all sides in the conflict in the interests of human rights. Taking sides will result in the other side and their allys having a backlash against you.
As others have said it's not just the Middle East, it's huge parts of South America, the Pacific Islands, and large parts of Eastern Europe and the ex Russian states.
The big draw to the Middle East are the vast reserves of fossil fuels, so maybe the answer is to really push for non fossil fuel technologies removing the interest in the region?