Professor Israel Knohl, who has been at the center of the discussion regarding the tablet known as "Gabriel's Revelation," has written an article in the latest edition of BAR on the find, which is posted here. April DeConick, in a piece posted today, hits the nail on the head:
So nothing is as "sure" as Knohl's argument suggests.
As it has already been stated by many, I think it bears repeating again. We need to exercise caution in not jumping to premature conclusions and connections based upon this find, until it's authenticity can be determined. Then I think we can approach an exploration of the meaning and impact of this new apocalypse.
IF this find can indeed be authenticated, I think at best what we might be able to say is that there was a certain stain of Judaism that had a concept of a dying and rising messiah. What needs to be kept in mind is that during the Second Temple period what we are dealing with is not a unified, monolithic "Judaism," but rather a series of "Judaisms" with certain common characteristics, but also exhibiting various distinctives all their own. My hunch is that even if this find can be authenticated, it most likely tells us more about a particular "Judaism" in the midst of "Judaisms."