To use one of my favorite author's favorite terms: "rubbish".The Second century played a key role in the development of ancient Christianity. From Pliny’s perception of the nova superstitio as separated from its Jewish roots to Celsus’ powerful attack on Christianity under Marcus Aurelius and thereafter, this period saw the wide social diffusion of Christianity,....
The evidence does not support this conclusion, no matter how many Italian scholars of diverse backgrounds, repeat the same slogans, mindlessly. Hadrian lived the early second century. There is no evidence for the existence of any Christian writings or beliefs, prior to the conclusion of the third Roman Jewish conflict, which resulted in the forced expulsion of all Jews from Jerusalem, and led, in my opinion, to the creation of the gospels, by the Nobel prize winning authors of yesteryear.
Celsus did not write anything, ever, that we possess today, or for the past 1,600 years. Who ELSE, besides Origen, (writing in 248 CE, supposedly, (though, where is that manuscript, today?), has ever commented on this supposed second century composition by Celsus?)
The Nobel prize for literature was awarded today, to a Canadian! (I am very fond of that portion of the great nation that lies just south of my hometown, notwithstanding their economic dependence on growing tobacco there.) So, literature is an important part of the culture of our life today. How long has that been true? 2000 years? 3000 years. Humans are inventive. They like to make up stories. These "scholars", in the quote above, are creative writers. They are writing fiction, nothing more.