This Gospel underwent distortion, addition and omission, because of the fact that it was not intended to be a permanent complete Guidance, hence it was not protected by God. Then in the year 632AD, God sent down the Final Testament, the Holy Qur'an.

Both the Bible and Quran confirm that all scripture prior to the Quran was meant to be for a set time, was incomplete, and was tampered with by man as described in these following verses:

    "Some of the Jews pervert words from their meanings." [Quran 4:46]  

  "So woe to those who write the Book with their hands, and then say, 'This is from Allah,' that they may sell it for a little price. So woe to them for what their hands have written, and woe to them for their earnings." [Quran 2:79]

    "Say, who sent down the Book that Mosses brought as a light and a  guidance to people? You put it into sheets of paper showing some of them and concealing much." [Quran 6:91]

    "And there is a group among them who twist their tongues with the Book, that you may think it is a part of the Book, but it is not part of the Book. And they say 'It is from Allah,'yet it is not from Allah, and they tell a lie against Allah and they know it. It is not for any human being to whom Allah has given the Book, the Wisdom and the Prophethood to say to men worship me instead of Allah," [Quran 3:78-70]

    "People of the Book! Our Messenger has come to you, making clear to you many things you have been concealing of the Book and forgive you much. A light has come to you from Allah and a glorious Book, with which He will guide whoever follows His pleasure in the way of peace, and brings them forth from darkness into the light by His will."  [Quran 5:15-16].

 Also in the Gospel, Jesus states that his message is incomplete;

"I have yet many things to say unto you, but ye cannot bear them now." (John 16:12)

Furthermore, even the Bible [Revised Standard Version] itself admits it has various distortions;

"How can you say, 'We are wise, and the law of the LORD is with us'? But,  behold, the false pen of the scribes has made it into a lie." (Jeremiah 8:8)

 "Behold, I am against the prophets, says the LORD, who use their tongues and say, 'Says the LORD.' (Jeremiah 23:31)

"But 'the burden of the LORD' you shall mention no more, for the burden is every man's own word, and you pervert the words of the living God, the LORD of hosts, our God."    (Jeremiah 23:36) 

" And the LORD said to me: "The prophets are prophesying lies in my name; I did not send them, nor did I command them or speak to them. They are prophesying to you a lying vision, worthless divination, and the deceit of their own minds." (Jeremiah 14:14)

Even Jesus admits the Scribes omitted things from the Bible;

" Woe unto you, scribes and Pharisees, hypocrites! for ye pay tithe of mint and anise and cumin, and have omitted the weightier matters of the law, judgment, mercy, and faith: these ought ye to have done, and not to leave the other undone. " (Matthew 23:23)

Paul even states the Gospel is unclear and incomplete;

"And on my behalf, that utterance may be given unto me in opening my mouth, to make known with boldness the mystery of the gospel," (Ephesians 6:19)

" But when that which is perfect is come, then that which is in part  shall be done away."1 Corinthians 13:10

In conclusion, whether you are a Christian or a Muslim, it is clear from both Scriptures that the Bible is unreliable and that the Perfect Quran is the True Guidance for us.

Peace