I expect people who hold very public positions of specific rights to keep those positions and moral values in mind when making decisions every time they make such decisions, not just when it is best for them.

Saudi Arabia's genocidal war in Yemen should be enough to make anybody ashamed for having anything to do with the autocratic KSA.

I mean US is the one which gives arms to SA. US also destroyed Syria, Libya, Iraq, Afghanistan, Somalia and so on. No one’s hands are pure when it comes to the military industrial complex.

This is the typical "no one is perfect, so beeing bad is also fine" - argument (which I personally disagree)

Not really. Unless you propose that he completely stops doing business with everyone, shuts down spacex and Tesla etc, not sure what’s your point. SA, a major energy country, having a stake in Tesla is a pretty remote thing as compared to their prince having a stake in a speech platform.