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The US wouldn’t dare attack Saudi Arabia. The last time the US was there—as friends to launch an invasion against Iraq it got a lot of Islamic fundamentalists angry because a bunch of non-Muslims were too close to Mecca. They considered it an affront and one of them got a bunch of other fundamentalists to fly airplanes into buildings.
Attacking KSA is a good way to enrage a billion Muslims world wide. They’d see it as a neo crusade.
This sounds like they are removing freedom from their oil. Some people don't like that.