There’s nothing in the actual historic record from the time (which are extensive) indicating an actual person existed.
The whole shebang of christianity can be traced back to sun god worship. The vast majority of the really good bits (virgin birth, death, resurrection) can be found on hieroglyphs inside the pyramids of Egypt – so about 2500 years beforehand. (Which is why many previously devout christian egyptologists abandoned their faith).
If you’re looking for “balance” you cannot get it when people’s belief is bound up so tightly in it. – Remember: believing is a verb – something you do – which is “thinking something is one way, despite evidence to the contrary”.
There’s overwhelming evidence that all of the religions of the world are a crock of made up shit. Made up shit that make people feel good, maybe, but made up shit nonetheless. Not least christianity – the origins of which can be clearly traced back many more years before Zero AD than we are past it.
I’d personally feel secure in the knowledge that your family member is correct, that christianity is dying out in the civilized west (whilst the catholic church continues to forbid condom use in devote AIDS-riddled parts of Africa, resulting in untold suffering (including baby-rape)) and that we’re beginning to emerge from this fog of violent, misogynist idiocy.
But you’ll believe what you want either way. 🙂