As a student of historical critical writing and form criticism from a Biblical perspective, I am well aware of past and modern authors who wish to write Christ out of the Gospel, and to trash most of what he is reported to have taught and done. Nothing new here, this has been going on since the 18th century.
However, we should remember that those early believers in a supposedly "phantom" Jesus were willing to do all and risk all for their belief. While many may be content to spin fabulous stories, not many are willing to die for those fables. Christianity has been from the beginning a religion that people were willing to make great sacrifices for, and to practice altruism and philanthropy for.
I prefer to think it was for more than for "a tale told by an idiot, full of sound and fury, signifying nothing."
If you would accept the word of the critics, none of the important people mentioned in the Bible ever actually existed. No Abraham, no Jacob, no Moses, no Joshua, no Saul, no David, no Isaiah, no Jesus. Strange, then, that this book and its heroes of faith have spawned a nation, several religions, and an ethical flowering of humanity. All on the basis of unrealities? If that is the case, unrealities must be more real than reality itself.
Over the centuries, archaeoligists have found physical verification and memorabilia of many people mentioned in the Bible, who were previously thought to be have been non-existant. Just a few years ago, there was found the tomb of the high priest Caiaphas, who presided over the trial of Jesus. Before this find, the critical scholars were as certain that there was no such person as Caiaphas as they are presently certain that there was no such person as Jesus. In fact, so often have the "missing" people of the Bible been verified, that it is really a dangerous thing to assert that they did not exist, simply because we have not "found" them yet.
And Jesus? He lives in the hearts of millions. Not bad for a phantom.