Because of lots of historical precedent that the US values it's relationship with SA over any principled objection to bad behavior on the part of SA? Obviously there are lines that couldn't be crossed, but SA believes this murder wasn't one of them.
Also the oil dependency graph can change during resource-intensive conflicts.
But my question wasn't what "spice" means, I assumed everyone on Hacker News knows that.
I was asking why Saudi spice is particularly relevant to US interests, when we're a net exporter of said spice.
It was admittedly a bit tongue in cheek; dramatically reduced Saudi supplies would impact energy markets in a bunch of second and third order ways we might not like.
But that doesn't mean we have to keep selling them guns.
2) The literal answer is that the U.S. never bought anything much from S.A. except oil, and that pretty much ended after fracking made the U.S. a net exporter.
3) If S.A. actually executed a UN official from a NATO country, it might result in a lot more.
4) Given the state of the U.S. economy, and the nearly-civil-war level of polarization, I don't think Biden is looking for an excuse to get into foreign policy projects right now. We have enough trouble running our own country.