Yes. With the astronomical level of clout that Elon Musk has, I'm willing to call him immoral, unethical, and a bad person for doing business with KSA. A vanishingly small number of people are as influential as Musk, and his actions inspire and are emulated worldwide. Saudi Arabia is currently trying to rehabilitate its image (while maintaining its vicious corporal punishments, extremist views, support of terrorism, and legalized misogyny) and shouldn't have help from anyone who claims to care about anything other than profit.
Probably the biggest single thing you guys could do to make this thread even worse is turn it into yet another comic book feud about Elon Musk. Enough with that, please.
More generally, please don't practice the online shaming culture of denunciation on Hacker News. It makes for lousy, predictable discussion, regardless of how right you are or feel. From an intellectual curiosity point of view—which is the main value of this site—all denunciations are the same.