Take something more relevant to the dangers of AI. It could be an entirely rational belief that the vast majority of human procreation results in human suffering and despair (not to mention an order of magnitude greater suffering and despair for other organisms on Earth), so the only compassionate thing to do is to end that suffering - by euthanizing every human on Earth.
At least personally, that seems like a bad outcome to me. But I just make that point to show that our "human values" are not internally consistent. It's easy to read the writings of Aristotle (often considered one of humanity's greatest philosophers) and hear him argue that slavery is an absolutely just and rational outcome of war. "Human values" are all just a bunch of gray areas and judgment calls over which there is no consensus.