First of all, would be
Joshua said to all the people, “This is what the LORD, the God of Israel, says: ‘Long ago your ancestors, including Terah the father of Abraham and Nahor, lived beyond the Euphrates River and worshiped other gods.
So the Bible itself gives to its founder only a pagan background
AND
The question of Natural Law and Reason is the first call conscience of ANY person gets from the rational, trustworthy God. and this explains the incident with Abraham and Isaac
Therefore God is not ashamed to be called their God, for he has prepared a city for them. even though God had said to him, "It is through Isaac that your offspring will be reckoned." Abraham reasoned that God could raise the dead, and figuratively speaking, he did receive Isaac back from death.
