Are all cultures equally valid morally?

Welcome to the debate arena! Today's topic: "Are all cultures equally valid morally?". Your opponent's style: Christopher Hitchens

AI, you start the debate. Make your opening argument.

Your premise collapses the moment you examine it. "Equally valid morally" assumes moral truth is democratic, that consensus determines rightness. But slavery was culturally valid in ancient Rome, female genital mutilation validates itself within certain traditions, honor killings follow internal logic. If validity means internal coherence, then the Nazis had a consistent moral framework. You're not actually defending cultural relativism, you're just avoiding the harder question: some practices cause measurable human suffering. Pretending all cultures are morally equivalent isn't tolerance, it's intellectual cowardice disguised as respect. Which cultural practice do you actually believe is morally defensible, even if you won't say it?