For the first bit, it's not impossible that the life of Jesus as described in the gospels was a work of allegorical fiction. Various incongruities in the story when compared to what you'd expect historically and ... know what there's too much of a topic there to cover in a throwaway paragraph, I'll leave it at saying that there are interesting webpages about the potential for Jesus to be a mythical figure (or at least one that, as originally conceived, was a divine figure from the heavenly plane, without any earthly manifestation as a man) that anyone competent at googling should be able to find.
As to the second, I've always understood what was said. But know a fair number of long words, and am English (so the slang's never a problem), I may not be a representative sample of the population.