I wanted to point you to a good and concise rebuttal of Newsweek's recent Christmas cover story entitled "The Myths of Jesus."
But first, it would help if you read what Dr. Bart D. Ehrman wrote. The Daily Beast has it posted under the title What Do We Really Know About Jesus?
Take a few minutes and read that and then read this rebuttal.
Rebuttal to Newsweek's Cover Story on 'The Myths of Jesus'
The work that Jerry Newcombe cites in his article is the
New International Encyclopedia of Bible Difficulties
by Gleason Archer