I ask again, why do we have to answer this question? Who gains from writing viruses that cripple computers? Who gains by inventing the thousands upon thousands of hoaxes that populate snopes.com? Who gained from creating the Hindu myths? Do we really have to know what the motivation was behind someone inventing a fantastic tale to recognize a fantastic tale when we hear one?
Is it not obvious that someone gained due to the propagation of these myths? The historical record as well as the present is filled with those who have invented religious beliefs to suit whatever agenda they had. From Joseph Smith and Mohammad to L Ron Hubbard, Marshal Applewhite and J.Z. Knight. Is a religion invented by unnamed people somehow more credible than one invented by known people? How many characters did Joseph Smith invent in his fantastic tales?
That is just noise. If you deny Napoleon on the grounds that Thor is mythical, feel free, but don't expect sensible person to agree.
I don't
deny Jesus is historical, I am
skeptical because ... well ... the evidence for the existence of this individual isn't much better than the evidence for the existence of Thor. I believe my skepticism is justified because if someone did the sorts of things this character allegedly did in front of crowds of thousands of people as the stories describe it is a reasonable thing to expect that
some contemporary historian would have made some note. We have (for example) the writings of Philo of Alexandria, who lived right during the sweet spot when all these things were supposedly happening. He wrote about Jewish offshoot sects
and lived in or near Jerusalem when all this stuff was going on. He would have been about 10-15 years old at the time. The
perfect external witness. Yet somehow all these incredible events escaped his notice and instead he was captivated by such relatively mundane sects as the Essenes and the Therapeutae. The first time
any non-apologetic historian mentions this character is
maybe Josephus, writing some 60 years after the time in question. We know much of that was the result of pious fraud and what (if anything) remains could be the result of him simply taking for granted that this man so many were talking about actually did exist.
No, it's not a slam-dunk, but it is
perfectly reasonable to suspect that these stories were fabricated and did not happen as described. After all, people
don't walk on water, turn water into wine, heal blindness, leprosy, paralysis and erectile dysfunction with a touch. Well, the last one ... maybe. People don't routinely have conversations with the demons responsible for epilepsy or insanity before casting them out. People don't turn morsels of food into feasts for thousands, raise dead people to life or levitate off into the sky to disappear into the clouds never to be seen again.
By contrast, the external corroboration for the existence of Napoleon Bonaparte is exhaustive. Letters written by him and to him. Bills of sale. Legal documents, diaries of people who met him, documents written by contemporaries who disliked him. Items of clothing he wore. Weapons he used and myriads of other artifacts. Portraits of him painted by contemporary artists. Napoleon did some significant things, but he did not cure blindness nor could he levitate off the ground or walk on water. The sorts of things he did are the sorts of things many others have done before and since. He was a brilliant military strategist, he orchestrated some successful battles, he eventually got beaten, he spent his last days in exile and he is now buried in a war memorial cemetery (Les Invalides) in Paris.
In short, Napoleon is a well-evidenced person who rose to greatness (as certain people are have done many times). Jesus is a non-evidenced story about someone who did things nobody has ever done before or since. My skepticism is warranted.