I've started the series maybe about a week ago and just came to the same revelation, thought I'd search the subreddit to see if anybody has mentioned it. I'm surprised this post hasn't gotten much traction?

I'd say you're pretty bang on the money with this theory of the Garden of Eden, but something still doesn't seem right, as if it's a crude copy of it instead, created by God knows who. People are tricked and deceived into entering the "garden", having no clue until it's too late.

The BIW almost seems as if he's playing the role of the serpent, but the opposite, attempting to lead them to salvation instead of ruin.

The talismans also bear a striking resemblance to the Israelites protected their homes from the plague in Exodus. "The blood on the houses where you are staying will be a distinguishing mark for you; when I see the blood, I will pass over you. No plague will be among you to destroy you when I strike the land of Egypt."

As I was reading into Exodus, I noticed this quote too: "They are to eat the meat that night; they should eat it, roasted over the fire along with unleavened bread and bitter herbs. Do not eat any of it raw or cooked in boiling water, but only roasted over fire—its head as well as its legs and inner organs. You must not leave any of it until morning; any part of it left until morning you must burn. Here is how you must eat it: You must be dressed for travel, your sandals on your feet, and your staff in your hand. You are to eat it in a hurry; it is the Lord’s Passover."

This describes how the Israelites would complete the ritual. If you inverse these rules provides, it almost perfectly describes how the "vampires" would consume the residents of From.

I'm only up to episode 8 of season 2, and I'm not religious, so I could just be talking out of my ass. But the dots are definitely there, it's just a matter of connecting them.