To say Jesus mission is full filled is inaccurate according to Islam. Jesus(pbuh) did bring down the gospel, which was inscribed in him. According to the Quran, The miracle child spoke at birth to protect HIS mother Mary(pbuh) from their people, who were outraged that she would have a child with out being married and coming from a righteous family as well.
The Verse goes as stated
“O sister of Aaron! Thy father was not a man of evil, nor thy mother a woman unchaste!”
But she pointed to the babe. They said: “How can we talk to one who is a child in the cradle?”
He said: “I am indeed a servant of Allah: He hath given me revelation and made me a prophet;
“And He hath made me blessed wheresoever I be, and hath enjoined on me Prayer and Charity as long as I live;
“(He) hath made me kind to my mother, and not overbearing or miserable;
“So peace is on me the day I was born, the day that I die, and the day that I shall be raised up to life (again)”!] (Maryam 19:26-33)
Note - The word die here is ment only in the physical relm, but spiritually well that unkillable.
JESUS(PBUH) SPOKE AT BIRTH, The Second miracle sent with Jesus( pbuh) after his birth. As I explained the Quran says, the Gospel was inscribed in him, further clarifying that he only spoke the Gospel, further authenticating and affirming the other descriptions about Jesus (pbuh) in the Quran, as the word of God, the spirit of God, the Son of Mary.
The Quran clarifies all miss conceptions about Jesus, his birth, his mission, his peoples rejection,The Jewish leadership plot against him, his message and his return. Jesus(pbuh) will return, because according to the bible the comforter would speak pure of inspiration and that he is an unlearned man. Mohammad(pbuh) spoke out of pure inspiration. Source
