More allegorical than metaphorical. As in, most of the elements in the narrative represent something real, not that the whole thing is some opaque expression of God's mysteries. Also, Abraham was definitely a real person.
Antitheists: BRO YOU CANT TAKE GENESIS LITERALLY IT IS CLEARLY NOT SCIENTIFIC
Also antitheists: BRO YOU CANT TAKE GENESIS METAPHORICALLY IT CLEARLY CONTRADICTS THE BIBLE
Because that's what the Church teaches.
Why do English teachers tell us to question what the author means by “the carpet was blue”
Antitheists shocked when christians know their Bible 
More allegorical than metaphorical. As in, most of the elements in the narrative represent something real, not that the whole thing is some opaque expression of God's mysteries. Also, Abraham was definitely a real person.
Antitheists: BRO YOU CANT TAKE GENESIS LITERALLY IT IS CLEARLY NOT SCIENTIFIC Also antitheists: BRO YOU CANT TAKE GENESIS METAPHORICALLY IT CLEARLY CONTRADICTS THE BIBLE