I understand why atheists and agnostics would question the miraculous nature of the man Jesus. I don't understand why people want to erase him from the historical record, though. Also, when faced with historical evidence, I've noticed that some will continue to fight passionately against the idea that Jesus ever lived. Why is this? It's more a rhetorical question because there can be a variety of answers and the reasons are personal.
I am not one who believes that Jesus was God. Though we can't really prove that he was not God. And if he was I'm cool with that. I am impacted by the influence his existence has had over the world since the time of his birth, even affecting the western calendars. There are things claimed that he said and did, when taken alone, that are pretty impressive. One example would be the saying, "Live by the sword and you may die by the sword." Another is the Golden Rule. I'm not sure about some of the miracles, but if they happened then I say wow. I've seen some things in my life that were pretty miraculous, though in smaller ways than say walking across the water. I'm not so dead set against the idea that Jesus lived and that he imparted some wisdom and did some miraculous things. I'm not freaked out about the possibility, in other words.
I have always felt like some unscrupulous people have used Jesus to further their causes or to control the behavior of others. I recognize that the Bible is collection of books and not God's communication to humankind, though I am sure there are some truths and wisdom contained within those books. It isn't Jesus' fault that people have misrepresented him. I don't think he is anyone to be so afraid of that when faced with historical evidence that he lived, that one should live in fixed denial.