In the op you mentioned that you were of the opinion that the Jesus of Christianity did exist, I'm not being a prick I promise but I wonder if people who do believe in his existence have thought of what that actually would mean. This is a quote from CS Lewis' book Mere Christianity that I've always found very pointed:
In his famous book Mere Christianity, C.S. Lewis makes this statement, "A man who was merely a man and said the sort of things Jesus said would not be a great moral teacher. He would either be a lunatic--on the level with a man who says he is a poached egg--or he would be the devil of hell. You must take your choice. Either this was, and is, the Son of God, or else a madman or something worse. You can shut him up for a fool or you can fall at his feet and call him Lord and God. But let us not come with any patronizing nonsense about his being a great human teacher. He has not left that open to us.