Question

I have a question bouncing around in my head. it's not a particulatly clever question, I am not at all sure it even makes sense. Kind of came to me in a medicated haze. But it's bugging me, so here it is...

So there are a couple different versions of that Last Supper thingie. One gospel says that Jesus said that he would be betrayed by someone there but not who it was. One said that he would be betrayed by Judas. The assumption/belief whatever is that Judas was for whatever reason and ass, evil/mean/spiteful, what have you. He betrayed Jesus and was ultimately responsible for his death. But could the betrayal really have been the Gospel of Judas itself?

Or is it the rambling of some nutcases in the second century just trying to create a stir?