After reading the preface, I wonder if it will consistently say "Yazîdîs or Devil-worshippers" for the rest of the book too. I know to have low expectations of a book from 1930, but still, it's gross. Describing the Enūma Eliš as the "rebellion" of the "evil" goddess Tiamat is more forgiveable because it's a common Western misunderstanding and I'm not sure how much of the text was available back then.