Well here's what I know/believe (or think I know, having actually studied this topic)
Scientists and ancient historians and classicists have come to the general agreement that jesus did exist. He was the man written about in some ancient documents that came to be the bible.
Some of the things written about him were true, and some of the things written about him were more like folk tales, stories meant to make a point and have a meaning but not necessarily true.
He probably was some sort of social activist. The stories of his miracles, birth, etc., were written long after he lived and are more like folk tales, but based on their nature can give us a clue about who he was and what his lasting impact was.
I'm not christian, so I don't feel the need to argue that Jesus was a great religious figure or needs to be worshipped. But I am a scientist (or scientifically/historically inclined, at least) so I will say that I think he existed and did have an impact on the society around him.
Wherever you go from there has to do with your personal beliefs.