Surely the Exodus will just be the Israelite origin myth, like Aeneas or Romulus and Remus, or like the Pilgrims and the mayflower (which is surprisingly steeped in myth). Having the bible as the only corroborating evidence doesn't really make it look like it could be anything else.
If more of us valued food and cheer and song above hoarded gold, it would be a merrier world. - J.R.R Tolkien