Bryan Patterson nails it:
There is no room in this story for regarding this Jesus as merely a good spiritual teacher. He was either a dangerous megalomaniac, a liar or what he said he was.As Bertrand Russell points out, Jesus:
certainly thought that His second coming would occur in clouds of glory before the death of all the people who were living at that time… The early Christians did really believe it, and they did abstain from such things as planting trees in their gardens, because they did accept from Christ the belief that the second coming was imminent.
Jesus is a living and loving being involved in the rebirth of those who want it. In that sense, there is no need for historical proof.Just as well there is no need for evidence. None exists.