The so-called Gospel of Judas is a case in point.
1] This 'gospel' dates from the 3rd or 4th century which hardly compares well with the fragments of John and Mark's gospels which date back archaeologically to the first century.
2] It is claimed that there might have been a 2nd century, greek version. Probably not, and even if correct, then so what?
3] It was produced by the gnostics who bear little similarity to the Christian Church and calling them a cult would be quite kind.
4] Why do historians take rejected texts and attribute a greater worth to them than the Christians did at the time?
5] Do they not grasp that rooting through historical 'dustbins' can produce gems but usually all you are usually going to find is rubbish.
6] One small and possibly trivial extra point, Judas Iscariot died a few days after Jesus.
Are they really claiming that they have found his notebook from those days when he was a disciple? - Oh dear! If that is not their claim, then how do they explain the massive contradiction?
7] Of course, the other gospels were written to inform as the eye witnesses died off. How would Judas have fitted into this picture?
I am totally fed up of mindless books for the terminally simple and feeble TV programmes on National Geographic or The History Channel putting this kind of rubbish forward as if it has some historical value for Christianity. It has none whatsoever.