Contradiction with John 8:39
This verse states that if you were Abraham's children, you would do the works of Abraham, implying that the true children of Abraham are not determined by physical descent alone but by actions, contrasting with Romans 9:7 which suggests a spiritual lineage.
John 8:39: They answered and said unto him, Abraham is our father. Jesus saith unto them, If ye were Abraham's children, ye would do the works of Abraham.
Contradiction with Galatians 3:29
This verse claims that if you belong to Christ, then you are Abraham's seed, and heirs according to the promise, suggesting faith in Christ, not lineage, identifies one as Abraham’s seed.
Galatians 3:29: And if ye [be] Christ's, then are ye Abraham's seed, and heirs according to the promise.