WikiPedia - Historical Jesus: "Most contemporary scholars of antiquity agree that Jesus existed, and most biblical scholars and classical historians see the theories of his nonexistence as effectively refuted. There is no indication that writers in antiquity who opposed Christianity questioned the existence of Jesus."
Josephus & Tacitus recorded evidence of Jesus' existence and Rabbi Nelson Glueck, a renowned Jewish archaeologist said this about Bible references: "It may be stated categorically that no archaeological discovery has ever controverted a Biblical reference. Scores of archaeological findings have been made which confirm in clear outline or exact detail historical statements in the Bible. And, by the same token, proper evaluation of Biblical descriptions has often led to amazing discoveries."
Even if these references are ignored, the greatest undeniable historical fact about the man known as Jesus Christ (apart from Christianity itself ) is this: thousands of 1st century Christians (and their families) were willing to be crucified, burned alive, or eaten alive by wild animals, rather than renounce their faith in someone they had most likely personally seen. Personally, I think many people would readily deny a long-held belief in anything they believed, rather than face such terrible fates. They had a choice to avoid the consequences, but for reasons of "faith", they refused to deny Jesus Christ.