I have heard it several times since and it still tends to rock me back on my heels somewhat.
There is, it appears, a sizeable proportion of the population (certainly of the British Isles) who regard the birth of Jesus Christ as pure fantasy; it didn't happen, after all it was 2,000 years ago, where's the proof?
These same folk often have a keen interest in things historical, ancient even .
Egyptology, Paleantology, you name it, they like it, in fact, they appear to be fans of quite a lot of ologies.
Most of these interests pre date the birth of Christ by a couple of thousand years at least.
So, where's the proof that Tutankhamun existed? How do we know that Sabre toothed tigers once prowled around Westminster Cathedral? And where's the evidence that early man fashioned tools and weapons out of stone?