they accept the father tho and they admit the son existed retard
1. At first Quran gets the trinity of Christians false, it is there Father, Son and Mary, and as apart different Gods.
And when God said, ‘O Jesus son of Mary, didst thou say unto men, "
Take me and my mother as gods, apart from God"?’ He said, ‘To Thee be glory! It is not mine to say what I have no right to. If I indeed said it, Thou knowest it, knowing what is within my soul, and I know not what is within Thy soul; Thou knowest the things unseen I only said to them what Thou didst command me: "Serve God, my Lord and your Lord." And I was a witness over them, while I remained among them; but when Thou didst take me to Thyself, Thou wast Thyself the watcher over them; Thou Thyself art witness of everything.’ S. 5:116-117
2. Denied trinitiy:
"Praise to Allah , who has not taken a son and has had no partner in [His] dominion and has no [need of a] protector out of weakness; and glorify Him with [great] glorification."
Verse (17:111)
O followers of the Book! do not exceed the limits in your religion, and do not speak (lies) against Allah, but (speak) the truth; the Messiah, Isa son of Marium is only an apostle of Allah and His Word which He communicated to Marium and a spirit from Him; believe therefore in Allah and His apostles,
and say not, Three (thalathatun). Desist, it is better for you;
Allah is only one God; far be It from His glory that He should have a son, whatever is in the heavens and whatever is in the earth is His, and Allah is sufficient for a Protector. S. 4:171
They indeed have disbelieved who say: Lo!
Allah is the Messiah, son of Mary. Say: Who then can do aught against Allah, if He had willed
to destroy the Messiah son of Mary, and his mother and everyone on earth? Allah's is the Sovereignty of the heavens and the earth and all that is between them. He createth what He will. And Allah is Able to do all things. S. 5:17
They are unbelievers who say, ‘
God is the Messiah, Mary’s son.’ For the Messiah said, ‘Children of Israel, serve God, my Lord and your Lord. Verily whoso associates with God anything, God shall prohibit him entrance to Paradise, and his refuge shall be the Fire; and wrongdoers shall have no helpers.’ They are unbelievers who say,
'God is the Third of Three (thalithu thalathatin). No god is there but One God. If they refrain not from what they say, there shall afflict those of them that disbelieve a painful chastisement. Will they not turn to God and pray His forgiveness? God is All-forgiving, All-compassionate. The Messiah, son of Mary, was only a Messenger; Messengers before him passed away; his mother was a just woman;
they both ate food. Behold, how We make clear the signs to them; then behold, how they perverted are! S. 5:70-75