Why do so many people who believe strongly in freedom also believe strongly in the Christian bible? The two aren’t particularly compatible. In the old testament, slavery is endorsed and its victims are told to know their place. (There is one exception: Deuteronomy forbids sending escaped slaves back.) And the new testament isn’t really any better: its spiritual virtues are all about humility and submission, not just to God but to earthly masters as well.
Small wonder that some would decide that the divine figure who represents liberty is not Christ or Yahweh, but Satan. He’s all about letting you make your own choices and live with the results. But is the Satanic approach any better? That’s where you can do whatever you want, not just for yourself, but against anyone else. Take from your neighbor if he’s weaker than you, rape anyone you can catch, or despoil things that other people depend on — it’s all good with Big Red. He’s even less oppposed to slavery than Jesus was.
Neither offers any concept of human rights. Those are a strictly secular invention. And without them, there’s no way for a society that values freedom to preserve it in practice.