If not for most of the good folks in the middle east that would be harmed, I would say everyone on the outside should get out and stay out and let Syria, Saudi's, Iran and Israel fight it out.
They all need a taste of war to know not to do it.

Oh what the heck, if we all get out of there and they have to think about fighting their own battles, I believe they will think twice on it anyway.
You can't make peace unless you fear war.
Everyone thinks the advantage is theirs with outsiders in play.