The failure of prophesy is just one aspect of a larger set of problems with the gospels and the bible as a whole....Which is why your analogy to fakery in science did not work. I was merely focussing on failure of prophesy because there are some who deny that this a failed prophesy.
I agreed about the prophecy. And you said "What then of religion altogether?" as though
sequitur. Non sequitur.
But it's not a non-sequitur. Obviously, it doesn't
necessarily follow that all religious beliefs are wrong just because of a dud prophecy, but it does cast serious doubt on Jesus and Christianity generally. As it should. And I don't mean the non-supernatural parts, there's plenty to admire about Jesus the man, and his philosophy, at least in terms of how it has come down to us through the texts. I'm talking about any supernatural aspects of either Jesus or Christianity. It's those claims that are damaged by the false prophecy. And subsequent questions could go from, 'do you think it likely he actually rose from the dead?', for example, all the way up to, 'did he believe in a god that may not have existed at all?'
I mean, if you take out rising from the dead, and add in not coming back a second time and the end of the world not happening, that makes a pretty good case for thinking the whole shebang lacks manifest supernatural credentials on its own terms.