You’re leaving out crucial pieces of information. Stop “them?” The world superpowers have meddled in, armed, and essentially used the Middle East as playgrounds for their international power struggles. So the entire world has been warring for millennia because going back to the times before that was the case, the rest of the world was fighting wars on our own turf. We just moved all of our wars there.
And this is no different. This is largely if not entirely propped up by “west vs east.” It’s just a sphere of influence for the rest of the world, and serves as a staging ground for wars we don’t want on our own doorstep. Nukes saw to that, I think. The “we’re not the ones at war” security blanket stops the nukes from dropping, I guess.