Copied from John Loftus blog, Debunking Christianity:
Meta-apologetics is concerned with apologetical issues, especially with regard to which apologetics method is the best one for defending the Christian faith, if one exists at all. I’m introducing a previously ignored meta-apologetical problem for Christian apologists to answer, if they can answer it at all. It constitutes a serious problem aimed at the whole apologetical enterprise. Why does it take so much effort and sophisticated knowledge to defend the Christian faith?
The probability that the Bible is God’s word is inversely proportional to the amount of work it takes Christian apologists to defend it from objections to the contrary (that is, the more work its defense requires, the less likely the Bible is God’s word), and it requires way too much work to suppose that it is.
Consider the sheer numbers of Christian apologists/scholars and books that have been published by the following author/editors: C.S. Lewis, Norman Geisler, William Lane Craig, Richard Swinburne, Paul Copan, Alvin Plantinga, N.T. Wright, Chad Meister, J.P. Moreland, Gregory Boyd, Gary Habermas, Steven Cowan, Douglas Groothuis, Peter van Inwagen, Randal Rauser, Michael Murray, William Dembski, Richard J. Bauckham, Michael Brown, Dan Wallace, D.A. Carson, G.K. Beale, Craig Blomberg, Craig Evans, Stephen Davis, Donald Guthrie, Ralph Martin, Richard Hess, Dinesh D’Souza, and Timothy Keller to name some of the more noteworthy ones. While some of these authors deal with the same issues most of their material is unique to them, for further defending their faith. If we add in their magazine and journal articles we already have a small library of works. If we were to get and read the references they quote from we have a whole library of works in defense of the Christian faith, a comprehensive case. That’s what a comprehensive apologetic requires. The important question left unaddressed by them, as always, is why a defense requires so many books? Why does Christianity need such a defense at all?