[pinkpanther]

Again. Let me remind you. What you have, the Gospels, all of them, are not the Injeel. They are the writings of unknown authors who wrote down their take on what they thought happened and the words of Jesus that were orally transmitted over a few decades.

So no, you cannot say what they have in the 7th century was the Injeel.

Can you demonstrate from your Quran that the fourfold gospel is not the Injil? Muhammad affirms the Injil, the Christians were reading it during his time

Does this mean Muhammad is affirming scriptures that have been corrupted? If the scriptures are indeed corrupted, then does that imply Islam's validity is compromised? After all, Allah instructs Christians and Jews to judge by their scriptures.

The Old and New Testaments were largely the same during Muhammad's time and remain so today. Scholars have a deeper understanding of this than you do. 

You can only claim that the OT and NT were corrupted before Muhammad's time, but ultimately, Muhammad affirms our scriptures.

That is the Islamic dilemma for you...there is no way round