Worst, it’s revisionist pseudohistory mixed with fiction and delusion. Well there is some archaeological evidence that corroborates some of the more grounded contents, and some of it is relevant to ancient culture and genealogy, it’s all mixed up with superstitious nonsense, magic, justifications for what we would now consider crimes against humanity, hyperbole, hallucinations, and code used to bad mouth authorities without getting executed. That last part is the entirety of the Book of Revelation.
It is possible to sift some facts out of it, but it’s far easier to either take it at face value, or cherry pick the parts you like. That’s what they do with it today, and honestly I would just do anything to make the entire concept of religion just evaporate from human consciousness.