Yeah if I’m not mistaken there are contemporary records of Genghis Khan, no?
The first ever mention of Jesus at all is in a writing from 300+ years after his supposed life. Also, Jesus is a character from a religious text which we all know cannot be trusted as historical fact. I think - but I could be wrong - that Genghis Khan is written about in numerous corroborating texts from the actual era? Someone check me on that please.
Edit: yeah I looked it up GK was in the 12th century that’s really not ancient. He’s written about in many sources from across Asia and Europe in many languages. That’s corroborating evidence. Jesus is not mentioned anywhere other than scriptures from hundreds of years after his supposed existence.
Plus there have been numerous figures in other mythologies that have many or most of the same characteristics which make it more likely a classical kind of archetype. Mithra, Horus, Krishna… and a handful of others who predate Jesus’ supposed existence. That’s actually counter-evidence that supports the idea that he was not real, in fact.