I only read a few pages of this post, so don't know if this theory has been presented.
I used to think Jesus was a normal dude caught in extraordinary circumstances. That doesn't quit feel correct. Their is a legend of a "golden child" of middle eastern descent going to India as a teenager, then leaving in his 30's after studying their philosophical issues. I do not remember the source, sorry. Bible says nothing of Jesus from age 13 to his 30's.
To many philosophies to count in India really. Buddhism, Hinduism, Zarathustra. Not sure but wouldn't be surprised if Taoism, Shinto, Confucius and all that stuff was around 2000 years ago in that region.
A few seers over time, Jesus, Buddha, Mohammed, maybe the blue dude from India (maybe silver poisoning? if he wasn't a hybrid alien or something) embodied a World Spirit. By World Spirit I mean a higher conscious awareness.
I would think these seers all have the similar message. Love thy neighbor, we are one, forgive them they know not what they do.
In any case, being confronted with profound inner truth is to much. People will shoot the messenger. Jesus was martyred. Even Socrates willingly drank Hemlock, when people really just wanted him to chill out and shut up.
Religion jumped in and said I'll help, I'll meter out the truth to you so you can accept it. The bible was written over centuries to present Jesus in such a way that he is a central story. A son of god. A religious structure arranged the "truth", in turn had a legion of followers (for centuries), and made a few gold coins on the side. Why not?
My opinion, Jesus was a swell fellow, but the system and story built in his name has nothing to do with him. Just a fantastic story. It could have been written about Bill or Chris for all it matters. Side thought, I find Eucharist sounds very similar to You Are Christ.
I've heard some other ideas, interesting stuff I guess.