Translation:

64. Say: "O people of the Book! come to common terms as between us and you: that we worship none but Allah; that we associate no partners with Him; that we erect not from among ourselves Lords and patrons other than Allah." If then they turn back say: "Bear witness that we (at least) are Muslims (bowing to Allah's will)."

Notes (Tafseer)

402. In the abstract the People of the Book would agree to all three propositions. In practice they fail. Apart from doctrinal lapses from the unity of the One True God, there is the question of a consecrated Priesthood (among the Jews it was hereditary also), as if a mere human being-Cohen, or Pope, or Priest, or Brahman, could claim superiority apart from his learning and the purity of his life, or could stand between man and Allah in some special sense. The same remarks apply to the worship of saints. They may be pure and sincere, but no one can protect us or claim Lordship over us except Allah. For Rabb, see i. 2. n. Abraham was a true Prophet of Allah, but he could not be called a Jew or a Christian as he lived long before the Law of Moses or the Gospel of Jesus was revealed.