To be brief: Historians have decided that there is a historical Jesus. Historian's views, practices, and research projects are the measuring rod for such an assertion.
I am a student of history, majored in it, wrote a thesis on late antiquity. I know the subject well and not all historians accept that Jesus ever lived. Stop this nonsense that all historians accept that he ever lived.
Why don't you go study up on the issues of constructing historical narratives? It's well documented. I could even get you started.
BTW: There's no Christian conspiracy going on on my part. Why don't you get all revved up about the historical King Arthur or the historical Socrates? You are the one who's looking narrow minded, ignorant, and frankly, not logical.