//Mr Atwill says he first discovered this revelation when noticing Jesus is “the only fictional character in literature whose entire life story can be traced to other sources”.//
There is much truth in that - although it was known long before Mr Atwill made his discovery.
I seriously doubt his theory - but then I seriously doubt Theland's theory too. Neither accord with my own.
//Mr Atwill says he first discovered this revelation when noticing Jesus is “the only fictional character in literature whose entire life story can be traced to other sources”.//