Bullshit. We do not support the KSA because they are medieval loons, we support it because they happen to be sitting on the world's largest known reserves of sweet crude. We could soooo completely clean them off that spot but don't. Think about it. Is that what you want us to do in the name of...
It's complicated. However the reason behind it is that it is not a great stretch to say that the world's financial (at least our world's) system hinges on the existence of the US/Saudi petrodollar.
https://www.investopedia.com/articles/forex/072915/how-petrodollars-affect-us-dollar.asp
This...