That’s his personal life and I fail to see why are we supposed to behave like some kind of religious zealots on marriage.
The best way to handle this should probably be to be upfront about it so that he could not be blackmailed. His only mistake was that he didn’t disclose it earlier when rumours surfaced
It's not about religion, it's about trust and keeping promises. Like it or not, the default understanding in a marital relationship in many places in the world is monogamy. Some people, of course, engage in other practices, after an explicit discussion, and agreement and understanding. But presumably Huang's wife believed she and her husband were in a monogamous relationship, and trusted Huang to keep it that way. That's the issue; religion is irrelevant. (And different religious practices have different things to say about monogamy vs. polyamory, and atheists decide for themselves if they want to be monogamists or polyamorists; religion need not be involved at all.)
But regardless, I think his infidelity is not his employees' business; IMO it's weird to bring it up in this way. The bit about his affair partner possibly(?) being a spy is the thing that actually matters to NVIDIA and NVIDIA employees, but he only dedicates a few sentences to it.
The moralists also conveniently ignore that the vast majority of men is not very attractive. Cheating would take a lot of effort for them. In contrast, I knew some men who were attractive enough they had to fend off women almost daily. For them, not cheating takes a lot of effort. The bottomline is that most of the 5/10 guys who say "I would never cheat" would do so the very next day if a 9/10 woman suddenly got interested in them, which is exactly what happened in this case.