See, Father Abraham was onto something ~ bet a whole big bunch of folks back in his day were sick of their tribes being hunted down for use in human sacrifices.
If Moses was 1450 bc, then when was Abraham?
Add 400 years of slavery, add lifetime of Joseph, Jacob, Isaac, and Abraham....roughly 900 years???
That puts us back to 2300 bc or so....some 4300 year ago. We're still off by 700 years.