This is an interesting blog post that comments on the potential meaning of the lack of contemporary historical record, that you are referring to:
Original blog post
Laura Miller, writing in Salon, does an appropriately contemptuous takedown of Michael Baigent's recent reworking of his crackpot/jackpot Holy Blood, Holy Grail theory, which doesn't hold up even to mild scrutiny. (It works as bad fiction, but not as bad nonfiction. It's no wonder Dan Brown has made most of the money from it.)
But when it comes to Jesus' existence, Miller blurs her eyes and displays nearly the same logical incoherence of which she justly accuses Baigent. Miller writes:
There are no contemporary accounts of Jesus' existence, although this isn't surprising, since he wouldn't have seemed sufficiently important to the people who wrote those accounts. Most modern scholars, including the secular ones, believe that someone more or less like Jesus did really exist...
These two highlighted statements pretty much contradict each other.
The alleged historical figure was:
"more or less like Jesus"
but at the same time
"he wouldn't have seemed sufficiently important"
WTF? How does one achieve these two conditions at the same time?
This remarkable-yet-unimportant historical Jesus apparently:
-Did not perform miracles
-Was not rumored to perform miracles
-Was not followed by large crowds of people
-Did not enter Jerusalem on a donkey (an extremely provocative action for a Jew)
-Did not declare himself the Messiah
-Did not disrupt the business of the temple
-Was not tried by the Sanhedrin on Passover Eve
-Was not tried by Pontius Pilate, who
-Did not send him to King Herod, who
-Did not send him back to Pontius Pilate, who
-Did not set free a known killer of Romans in an attempt to save Jesus, and
-Did not convict Jesus while Jerusalem was experiencing a near-riot
Any of the above would have been remarkable enough for chroniclers of the time to note. If the Gospel narrative is even sorta true, this would have been one of the most remarkable Passovers in the entire history of Jerusalem. And if this narrative isn't even sorta true, did Jesus really exist? How could someone be "more or less like Jesus" while at the same time substantially not do the remarkable things attributed to Jesus?
Add to this that the first records of early Christianity--at least its first forty years, probably more--also do not mention any of the above.
-Paul writes 80,000 words without mentioning any of the above events
-No writers of Jesus' time mention any of these events, either
-The events start creeping into Christian tradition gradually over the course of decades
Why would a reasonable person like Laura Miller conclude from this that the events substantially happened? Would it be news to Laura Miller that religions have been known to make stuff up?
It's possible that the historical events claimed in the Gospels "more or less" happened, and that writers of the time didn't notice them, and that Christians for decades didn't think them important enough to include in their writings, and then the events were spontaneously "remembered" bit by bit with enough accuracy to be "more of less" true.
It's possible. But it certainly isn't likely.
What is likely is that Jesus didn't exist and that religious fanatics actually made stuff up. It's the one theory that you don't have to throw your brain out to believe.