The root cause of the problem in the Middle East is two fold. First, the shites,sunnis, and jews have religious issues, and with or without meddling from the West they fight. Second, is the huge deposits of oil that make this pathetic region important to the world. The West develop their getting that oil out of the land, and distributing it around the world. Without the oil, no one but those that want to live there would care about it.
The oil is a fortune but it goes only to royalty, while the rest of the population is destitute. While Terrorists blame the West, it is actually the royalty they should be terrorizing. Some say, it is the royalty that is behind terrorism. In either case. these radicals have continued their war mongering.
The core is tribal, religious and territorial and they use the West to punish their own existence. Instead of growing with modern times, it would have been the land that time forgot, had it not been loaded with oil.