Seems like, if the Saudis had nothing to do with 9-11, then they should have nothing to worry about.
I think your comment....’nothing to do with 9-11’ is the pointed end of the stick. They know just how far their people reached in and poked the US, and they kept thinking that this day would never come. So, cutting us off from the oil? Seems like we made best friends out of Iran, and with the oil sands of Canada and fracking....we don’t have a problem.
Should they want to sell off the US debt and dump it? Fine...the value will quickly decrease on the debt papers and the Saudis lose tons of value.