You’re just not aware of the evidence. Plus, your requirement for historicity is biased towards your already a priori concluded viewpoint, only on this evidence alone. If you were to apply that standard of historicity to any other level of history, you would throw out all of recorded history prior to the printing press, and probably most of it after that.
You can start coming up to speed by reading
“THE NEW TESTAMENT DOCUMENTS Are they Reliable?”
https://freerepublic.com/focus/f-religion/1971569/posts
Then, once you have developed a rational viewpoint towards historicity, you can examine the PROVEN evidence that Jesus claimed to be God Himself.
https://freerepublic.com/focus/f-religion/3104583/posts?page=1#1
My impression is that you don’t post like someone actually seeking accessible answers, you’re just throwing up what you consider to be unanswerable questions so you can keep your current viewpoint. I would encourage you to seek the truth you claim you seek.
Read my tagline!
Regards,