Well, ah . . . you are a believer and apparently believe the historical Jesus existed, please explain why?!?!?!? Can you cite any outside references during the life of Jesus concerning his miraculous supernatural life?
Like othr historical figures in the ancient world there are historical literature that refer to Jesus existed, and even though they are not contemporary to Jesus they refer to testimony that Jesus existed, As with other historical religious figures it is sufficient to support their existence in history. The problem will always be that that like miraculous and supernatural claims today there lacks objective nor verifiable evidence for any miraculous events ever taking place.
It is time for you to make the effort to understand how academic history works instead of slinging maure based on a religious agenda. Religious claims and beliefs are NOT documentable in history regardless of which religion one believes. If you believe these event can be documented by second sources during the life of the religious leader please provide the references and evidence.