It doesn’t matter.

I’d say the “Real Historical Jesus” matters at least as much as a Real Historical Julius Caeser or a Real Historical Abraham Lincoln.

I always relate it to Ian Fleming having a schoolchum who’s father’s name was Ernst Stavro Bloefeld.

That’s different in so far as Fleming was simply borrowing a name for a totally independent character. But Fleming was, himself, a Naval Commander and intelligence officer who leveraged his own biography to inform James Bond’s personal traits. What’s more, he borrowed heavily from the reports and anecdotes of other intelligence officials both during and after WW2 to inform the behaviors and attitudes of his side characters in his original novels.

It actually is pretty interesting to talk about “The Real James Bond” from a historical standpoint, because British intelligence services were pivotal in maintaining the imperial and international financial controls necessary to run a globe-spanning empire.

In the same vein, you might be curious to read about “The Real Julius Caeser” after working through the Shakespearean play or “The Real Abraham Lincoln” after getting through the stories where he’s a Vampire Hunter.