I'm shocked that Glenn would pass up an enchanting experience with the Necronomicon just because the host has a minor skin blemish. If you don't blithely ignore portents of terror you aren't in a Lovecraft story. Also don't accept any party invitations from Lovecraft.
I don't think that the narrator's people are supposed to be what we would consider Native Americans. They are supposed to be a much older group. That's why 3 of them were hung as witches by the Puritans. I thought the winter setting was an interesting start for a weird story and I like the tie in to older Christmas rituals. It was a clunky transition though.