Did Jesus exist at all?

[Wyrd of Gawd]

From a practical matter it doesn't matter if the character existed or not. The believers want him to have existed and they base some of their actions on that wish. There is no celestial deity as described in any of the various religious fairy tales in this solar system. They are all imaginary. Even so it gives the various believers some measure of comfort to think that such beings should exist and give a rat's ass about their welfare in a cruel world. The better the story the stronger and more popular the belief.