I saw something on YouTube that tried to prove Christianity, Judaism are remnants of the beliefs of an older society. I don't know if its true or not. But I thought the Idea intriguing. Any thoughts or info on this?

Yes, however, in the opposite direction to your inquiry. Thomas Hartwell Horne presents historical facts, indeed, with more than ample evidences, in regards to the progress of invention, the art's and sciences. That they have in fact, have come from only the Mosaic period, and that all else, is from a later period, and of a minor consequence. The mainstay of known knowledge was brought forth from this period. Vol 1 p 141 ...progress of arts, sciences, and invention...