The USA will probably find this very embarassing in a few years time when the Saudi regime is finally overthrown.
More embarrassing than selling the ingredients for chemical weapons to Saddam?
Or stingers to afghans?
Or the Yalta/Potsdam/Balflour/any treaty you like
Or any number of instances of Realpolitik throughout the ages.
What a quaintly naive view of international relations you have.