Moreover, Allah—glorified be He—has cursed them on the tongue of His Messenger ﷺ, who said: “May Allah curse the Jews and the Christians; they turned the graves of their prophets into places of worship”—warning against what they had done. (1)

Yet the Scripture is one, the Lord is one, the prophet is one, and the claim is one. All of them profess devotion to the Messiah, to his Gospel (2), and to his disciples—yet they disagree about him in these mutually contradictory ways:
• Some say, “He is God.”
• Others say, “The son of God.”
• Others say, “The third of three.”
• Others say, “He is a servant.”
• Others say, “He is one hypostasis and one nature.”
• Others say, “Two hypostases and two natures.”
And there are still more doctrines that they recount from their forefathers, each one pronouncing the other an unbeliever.

If a people who had never recognized any deity were presented with Christianity in such a state, they would hesitate and refuse to accept it.

So weigh this against what was brought by the Seal of the Prophets and Messengers—may Allah’s blessings