It's also possible that the Saudi Prince's ethics are merely different from someone at Facebook but I don't think beheadings are commonly considered a good thing in the U.S.

The same kind of ethics that can justify every terrible action.

As usual if you feel fine and inline with the company's ethic then go for it. I suspect that most engineers and Facebook employee know deep down how shitty the product they build really is.

As possible as it is they have no morality at all.

Obviously that's exactly why they are NOT at facebook, though I chuckle at your attempt to reducing it to something as inconsequential as personal preference.