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the Quran’s claim to "confirm" the Gospel (Injil) is the ultimate logical suicide.
The Quran creates a "Catch-22" for itself: if the Gospel is true, the Quran is false (because they contradict on the Cross and Deity); if the Gospel is corrupted, the Quran is false (because it claims to confirm a corrupted book).
This isn't just a mistake—it is a total breakdown of the Quranic claim to divine authority.
In the New Testament, the "Gospel" (Euangelion) is the "Good News" regarding the Life, Death, and Resurrection of Jesus Christ.
Not a "Book" sent to Jesus: Jesus didn't "receive" a book from heaven; He is the message. The Gospels (Matthew, Mark, Luke, John) are eyewitness testimonies about Him.
The Core Message: "That Christ died for our sins... that he was buried, that he was raised on the third day" (1 Corinthians 15:3-4).
The Finality: Paul warns that even if an angel from heaven preaches "a gospel other than the one we preached to you, let them be under God’s curse!" (Galatians 1:8).
The Quran repeatedly asserts that it was sent to confirm the previous scriptures.
The Quran treats the "Injil" as a literal book "sent down" to Jesus, similar to how the Quran was allegedly sent to Muhammad.
"...And We gave him the Gospel, in which was guidance and light and confirming that which preceded it of the Torah..." (Surah 5:46)
This reveals a total ignorance of what the Gospel is. There is no historical record of a "Book of Jesus" written by Jesus. By confirming a non-existent book while contradicting the actual eyewitness Gospels, the Quran confirms a phantom.
In one of the most problematic verses for Islamic theology, the Quran commands Christians to judge by the Gospel they possess:
"And let the People of the Gospel judge by what Allah has revealed therein. And whoever does not judge by what Allah has revealed - then it is those who are the defiantly disobedient." (Surah 5:47)
If the Gospel was corrupted (Tahrif) by the 7th century, why did Allah command Christians to judge by it? If they judge by it, they must reject the Quran, because the Gospel says Jesus is the Son of God (John 20:31) and that He was crucified (Mark 15). The Quran is essentially commanding Christians to reject Islam.
The Quran claims to be a Musaddiqan—a "confirmer"—of the Gospel (Surah 3:3).
Confirmation means "to establish the truth of." You cannot "confirm" a document while simultaneously calling its core historical claims (the Crucifixion) and its core theological claims (the Deity of Christ) a "lie" or a "corruption." This is correction, not confirmation.
When faced with this, Islamic apologists claim the original "Injil" was lost and the current New Testament is "corrupted."
The Rebuttal:
The Manuscript Evidence: We have thousands of Greek manuscripts of the Gospel dating hundreds of years before Muhammad. They all contain the Deity of Christ and the Cross. If the "real" Injil ever existed, it vanished without a single trace in history, archaeology, or liturgy.
The "Protector" Failure: The Quran calls itself the Muhaymin (Guardian/Watcher) over the previous scriptures (Surah 5:48). If the scriptures were corrupted, then the Quran failed its job as a guardian.
The Logical Absurdity: If Allah is the one who revealed the Gospel, is He unable to protect His own Word? If men can change God's Word, then God is not all-powerful.
The Quran's claim to confirm the Gospel is its "Achilles' heel." It attempts to borrow the credibility of the Bible to validate Muhammad, but it ends up pointing a finger at its own inconsistencies. For a Christian polemicist, the choice is clear: you can believe the Gospel that was written by those who saw Christ, or you can believe a book that "confirms" it while calling it a fraud.