The Times article rightly asserts:The most revealing passages in the Judas manuscript begins, "The secret account of the revelation that Jesus spoke in conversation with Judas Iscariot during a week, three days before he celebrated Passover."
That is revealing, a signal that the Gospel of Judas is an example of an early Christian heresy called gnosticism.
Not sure whether this was a completely unknown gospel before the discovery of the text in the 1970s or if it were known (and presumably rejected early in Church history) but never in a complete form. But it will no doubt shed much light on the mileiu of beliefs swirling around in the first couple of centuries A.D.