If anything the invented miracles indicates a "motive" for a construction that should be close enough to verifiable truth to be "believed." Ln Dan Browns "Roswell Chapel" in the novel, The Da Vince Code, also DOES exist. I would further argue that there are *more* verifiable "facts" in The "Da Vinci Code" then in any one of the four Gospels.
I just hope followers of the Da Vinci Code will not start a major world War like believer in the Gospels did. Or/ and set the whole of Europe afire like believer in the Gospels did on several occasions during their 300 years of Crusades.
If noting else, religion might be comforting in the case of murder and warfare as seen above, I suggest however it is foremost a mental disease.