To be born again, as Jesus himself describes it, is to be born of the Spirit. That means that those who are not are in fact spiritually "dead".
Every religion has a cultural tradition of how much to accept as literal truth and how much to accept as allegory. The Spirit leads those into knowledge who are ready and able to accept it.
Jonathan Gray and other archeologists like him are proving every day that the OT historical accounts are extremely accurate.
So, don't believe anything without proof, or at least confirmation.
It can be proven that the Red Sea was parted?