We have to take into consideration that Hashem didn’t want those things revealed until the late 1800s when the wellsprings came forth. Humans were not ready for this information until the time of the redemption, although Sages who lived beyond this World of Lies had this knowledge beforehand.
Shema Yisrael, Hashem is One. There is only one knowledge that has now burst forth into many different streams and religions all steaming from the one knowledge that was given to us on Mount Sinai.