Clearly you don't understand "fiction" or the foundations of fiction. Nothing in Brown's answer conveys that the STORY is real. The STORY is FICTION.
Look up FICTION in the dictionary.
Yes, the story, the plot and characters are fictional. But the story’s appeal is that its, according to Brown, factual underpinning is true. This factual underpinning has been shown not to be true.
And it has been shown that Brown claims it is true.
You do understand this point, yes?
In an earlier post, you said you believe: “the facts, as collected and related by Brown are true.”
Specifically, do you believe:
The Priory of Sion, founded in 1099, with members including Sir Isaac Newton, Botticelli, Victor Hugo and Leonardo Da Vinci were responsible for preserving the True identity of Jesus to be released in the future?