What's the role of Mary in the Quran? | Mel & Paul Ellis Speaker's Corner

The Qur'an is somewhat confused about what Christians believe about the Trinity. It creates a strawman argument and then seeks to "correct" it, however, crucially Christians don't believe what the Qur'an claims they do.

And [beware the Day] when Allah will say, "O Jesus, Son of Mary, did you say to the people, 'Take me and my mother as deities besides Allah ?'" He will say, "Exalted are You! It was not for me to say that to which I have no right. If I had said it, You would have known it. You know what is within myself, and I do not know what is within Yourself. Indeed, it is You who is Knower of the unseen. I said not to them except what You commanded me - to worship Allah, my Lord and your Lord.

— Quran 5 (Al-Ma'ida), ayat 116-118
The factual errors made by the Quran in these ayas is clear when we consider these facts:
1. Christians do not believe Mary is a deity
2. Christians do not believe in 3 gods, ie 3 separate deities
3. Christians believe God is Father, Son and Holy Spirit.