money chasing is, of course, amoral.
to be clear, this isn't even a case of "oh but they were forced into it" or "they'll go out of business if they don't"-- not that either of those absolve responsibility.
they're working to make this happen. they WANT to support the saudi regime.
i guess some people will try to break out the old "not everything is black and white" chestnut wrt the saudi government. unfortunately this is in fact an issue that is black and white with no moral ambiguity; the saudis execute dissidents, oppress women, suppress free speech, are waging a war of starvation against civilians in yemen, all while supporting jihadists worldwide. the average saudi person is probably a nice person.
but that doesn't make it okay to do business with them.