Theologians wrote everything concerned with religion.<quoted text>
You have much to learn, child.
In the canon, the only NT books actually written by the person to whom they are ascribed are the genuine letters of Paul -- about half of them.
Someone named John of Patmos may actually have written Revelation, but that was not the Apostle John.
Luke? Who knows for sure? Doesn't really matter.
The fact that you don't trust a Muslim theologian should indicate to you why I don't trust words from ANY theologian ... including your favorites.