Personal insults won’t convince me. Evidence will.
But the tl;dr is that his existence is attested by non-Christian sources
Hearsay written decades later.
and further details can be filled in by critical analysis
Critical analysis shows forgery. The multiple surviving accounts don’t agree with each other. Just like any liar, they couldn’t keep their story straight.
such as early Christians having no theological interest in making up him getting baptized by John)
Yeah this is bull. John the Baptist was widely respected in the area at the time of the jesus con. Connecting him with Jesus would have been good old fashion name dropping.
He was prominent enough as an itinerant preacher to be mentioned by the histographers of his time.
Ok who in his time named him? Please show me the contemporary writing that says anything about Jesus.
Frankly speaking Buddha is on more shaky grounds, though his historicity is also widely accepted.