The language barrier may be part of the problem, I agree. I read the story, and found it rather fractured and incomprehensible for the most part, and filled with just as much fantasy as the biblical story it's trying to deny. I'm sure that the story sounds much more appealing in the original Arabic, though I would not understand it that way. But it is still making claims that certain events actually happened without having any evidence for those claims. After all, we're talking about a book written more than 600 years after these events supposedly took place. Even the new testament is older than that! And it's all based on "revelations" from an angel? If someone today tried to make that claim they would be immediately placed into an institution! (Or maybe not! The claims made by Scientologists are even more fantastical, even more insane, and they've managed to stay out of the asylums.)
Of course, if domaster wishes to provide evidence that this particular story has any more basis in fact than the biblical story, I'd be happy to hear it.