There's a difference between neutral and simply uninformed. To claim that Christ was married would attack the credibility of the Apostles who wrote the New Testament and said nothing about any wife, and plainly declared that Christ is God (would God take on a wife?). Mind you, this document is from the 8th century, and so it has no baring on anything.
We could debate about being uninformed vs. misinformed by faith in church teaching.
All biblical scholars subscribe to the proposition that the books of the New Testament were written decades or centuries AFTER the events they describe—not by the actual Disciples.
Here’s a take by Bart Ehman, a professor of religion in his book about the contradictions in the Bible
“In Mark’s Gospel, Jesus is not interested in teaching about himself. But when you read John’s Gospel, that’s virtually the only thing Jesus talks about is who he is, what his identity is, where he came from,” Ehrman says. “This is completely unlike anything that you find in Mark or in Matthew and Luke. And historically it creates all sorts of problems, because if the historical Jesus actually went around saying that he was God, it’s very hard to believe that Matthew, Mark and Luke left out that part — you know, as if that part wasn’t important to mention. But in fact, they don’t mention it. And so this view of the divinity of Jesus on his own lips is found only in our latest Gospel, the Gospel of John.”