Ugh. Sorry, CZ, but the only thing you're proving is that Wikipedia is a terrible source.
I know this sounds smug and condescending and whatever else, but I'll still say it: the problem with the study of religion is that only idiots tend to study it. There is a severe lack of truly non-religious scholarly study that does what truly SHOULD be done: i.e. disregard all non-historical accounts, as in, the Bible. Rather than grasping at straws to try and correlate Biblical allegory, it needs to be studied like any other history.
And in that regard, there is NOTHING that proves the Jesus of biblical fame ever existed. The absolute BEST evidence we have is from Tacitus, who, IIRC, simply mentioned that a) the Christians were persecuted and b) a guy named Christus was executed. It's a little vague, even if you consider it to be fact.
But then you add in some of the complicating factors...like how Tacitus was born like 25 years after the supposed death of Christ. And that the oldest copy of his writing that has the mention of Christus and Pontius Pilate is from the 11th century. Oh, and I think it was in Tacitus's final writing from ~AD 100+. Basically, I am not an authority on the matter and therefore cannot declare it to be a spurious addition, but it damn sure raises doubts about its authenticity. Even if it is part of Tacitus's actual writings (again, not saying it isn't), the lack of any source other than hearsay is pretty damning; and Tacitus is known to have been in contact with Christians who would have been likely to pass along the story...if I recall right, part of his job in the Roman government was to supervise religious cults...
Basically, with ANY other supposed historical figure, we would probably have more factual proof of their existence. Then you add in the complicating factor- that this is not simply a historical figure, but one who exists so much more vividly in mythology.
Often times, we know LOTS about a historical figure. And on top of that, there are some anecdotes, tall tales, et al that are typically accepted as either totally untrue or maybe just hugely embellished off of something much more vague and less remarkable.
To take that and flip it on its head...lots and lots of storytime, with VERY little actual history, and a deafening silence from many sources where we might EXPECT to see a historical mention of the mythical figure...meh, no reasonable person should accept that as fact. Our society just has a favorable skew towards Christianity.
Would a couple mentions of Zues in secular Greek writings be enough to convince us that the Greek gods were, in fact, totally real?
[edited to elaborate Re: Tacitus]