I still don't understand why anyone would make up a person like the Biblical Christ..

[Minimalist]

You read the story of Moses, and say that is just insane, how could that happen

200 years of excavations in Egypt have failed to show any evidence that there were ever any appreciable number of slaves ( Israelite or otherwise ) in that country.

More recent excavations and surveys in Israel have shown that the populations which later became "Israel" and "Judah" did not enter the country in a wave of "Conquest" ( which those same excavations have shown did not happen either) but instead were indigenous peoples.

Against that you have a book of fairy tales. We are not the "insane" ones, lad.