Like for instance from Wikipedia:
> In the backlash against Saudi Arabia and Wahhabism (after 9/11), the Saudi government was portrayed in the media, Senate hearings, and elsewhere as
> a sort of oily heart of darkness, the wellspring of a bleak, hostile value system that is the very antithesis of our own. America's seventy-year alliance with the kingdom has been reappraised as a ghastly mistake, a selling of the soul, a gas-addicted alliance with death.[60]
> There was even a proposal at the Defense Policy Board, (an arm of Department of Defense) to consider `taking Saudi out of Arabia` by forcibly seizing control of the oil fields, giving the Hijaz back to the Hashemites, and delegating control of Medina and Mecca to a multinational committee of moderate, non-Wahhabi Muslims.
1. Security interests
2. Economic interests
3. Shared values
0. Personal gain
(At least until they start enforcing anti-bribery laws against the first family.)