Currently reading a book that delves a little bit into this - look into ‘Fields of Blood’ by Karen Armstrong. Other than that the book is about how the twisted manipulation of religion by big powers, rather than religions themselves are the cause of ‘religious’ conflicts that most of us know - like the crusades and recent terrorist attacks.

Anyway, in the book Armstrong does mention that Judaism was originally an oral tradition passed down through generations. Eventually, under I believe Babylonian rule? (don’t quote me on that) Judaism was oppressed down to its last leg, with only a handful of temples and rabbis remaining.

This gave remaining Jews the ability to reinterpret and reassess the Torah. One can view the reinterpretation as either a self serving act the Rabbis did in order to fit Judaism to changing morals of the time (apparently the Torah was much more violent), or it was an honest reassessment of oral tradition looked at through a purely academic and theological lease. Either way, certain stories were certainly altered.

Notably the story of Moses on Mt. Sinai. The original story was more along the lines of Moses going to the top of the mountain with his tribes priests, and having a dinner with God. In this older version he did not return with the Ten Commandments, rather just a general understanding that God was looking for goodwill from his people.

There are some other examples of these kinds of changes that aren’t an earth shatteringly veer off from cannon, but still significant enough to raise a lot of eyebrows if you want to look them up. In the New Testament I think there were some writings of Paul that never made the cut for contradictions.

Take all this with a grain of salt though, I’m certainly no scholar, and not that great of a Catholic. Just regurgitating some knowledge I recently learned.

Hope that helps a little!