OP, it isn't as simple as that. There are things that are happening behind the scenes that they're not telling us. For all we know, they all want the region to be in a perpetual war. Even the nations themselves who declare they want peace. Remember that war is also a source of opportunities for profiteers.
The US doesn't want that and never has wanted that.
Think about it. Instability in the Middle East jacks up oil prices, because the futures market is hedged against the expectation of future shortages.
Those who benefit from that are those in the Middle East with oil. For example, the Saudis...
They seem curiously to sit to the side of conflicts which never touch them, exerting subtle influences. Leaving all that aside, monetarily, they certainly benefit from higher oil prices.
Meanwhile, the US Fracking industry has directly caused a dramatic drop in oil prices, which nobody seems to be able to control.
But do not forget, the US is not wholly dependent on oil from the Middle East. The US has the largest oil reserves in the world and it can last them more than 100 years. And even a longer time than that if there comes a time to ration it. In fact it is still growing. They will not stop hoarding oil because it is one raw product that the whole world will need when it runs out. There's a theory that the source of fossil fuels will not last. The US knows this.
Also one thing about a perpetual war in the Middle East that the US wants is it makes them gain leverage over the region. They have the weapons and are willing to supply it only to those who ally with them. It's also a business.