3.

Did God choose to communicate the written oracles of God in the Bible specifically through the agency of the Jews?

Bible: Yes Qur'an: Yes

Romans 3:1-2 – 1. What advantage, then, hath the Jew? Or what profit is there of circumcision? 2. Much every way, chiefly because unto them were committed the oracles of God.

Romans 9:4 – the Israelites to whom pertaineth: adoption, glory, covenants, giving of the law, service of God, and the promises...

Al-'Ankabut 29:27 – We bestowed on him Isaac and Jacob, and We established the Prophethood and the Scripture among his seed.

Al-Jathiyah 45:16 – Before this, We had bestowed on the Children of Israel the Book and the Command and the Prophethood, and provided them with good things, and favored them above (all) peoples...