For a more benign example, you've got Holly's Wiccans creating an entire new history from various pieces of myth and lore; for a more realistic example you've got the LDS Church building on a whole mythology about the American continent. In most cases, it's got a pretty large gender quotient, which is so far absent from this story, but the overall message -- that if Might has somehow stopped making Right, we have to reset the whole system so we're back on top -- is pretty standard.
In this case, the "Original Testament," which they call the Vampire Bible but seems more like the Vampire Book Of Mormon, tells a story where Lilith predates Adam and Eve both, because God is a vampire in this story, and she's created in his image. This means that Adam and Eve are a paired mating couple, meant to reproduce sexually rather than vampirically, in order to provide food for Lilith and her Brood.
Makes sense, I guess, these things usually do, but I think you should always question most those traditions and scriptures which support your right to primacy: Any belief you have which coincidentally puts you on top and somebody else on the bottom, and it should just be a natural moral reflex to question that and flip it over, because your own sense of self-preservation, your entitlement to whatever privilege we're talking about, is not going to do that for you.
White people and rich people have a narrative where everything is fair and the deck isn't stacked, vampires have a narrative where humans are food, straight people have a narrative where one strictly defined kind of marriage is fundamental to society, men have a narrative where women are irrational, and so on. And when those kinds of privilege get threatened, you're going to provoke, always, a reactionary movement that invents as much history as it needs to, in order to fix the world, and which -- a more, fascinating recent development -- supports in turn a certain protective coloration of victimhood, a jealousy and taking-on of what is now seen as the given minority's "right" to complaint. A very real and terrified sense of being oppressed by equality.
Now, I don't know how or if Russell's Druid stuff (humanity as world-killing virus) is going to come into play -- maybe he's just 100% Chaos right now -- but I do feel pretty certain that you're going to get some Sanguinistas playing the victim card, and it's going to be excellent. Real "War On Christmas," reverse-racism, nasty privileged nonsense. Or at least that's the hope, because if you're HBO and you're already getting bitched at for "liberal bias," you might as well tell the truth and stop trying to make those fools happy with you.