Rational defense of Christianity?

[abaris]

It just puzzles me. There are many areas of knowledge, so I understand a Christian who doesn't know the reasons to disbelieve Christianity. I don't understand Christians that know these reasons and even agree with them - like John Shelby Spong (http://en.wikipedia.org/wiki/John_Shelby_Spong). I suppose I need to buy one of his books and read it.

I guess, you mean this character, since you're wiki link actually leads nowhere.

John Shelby "Jack" Spong (born June 16, 1931) is a retired American bishop of the Episcopal Church. From 1979 to 2000 he was Bishop of Newark (based in Newark, New Jersey). He is a liberal Christian theologian, religion commentator and author. He calls for a fundamental rethinking of Christian belief away from theism and traditional doctrines.

You won't find people like him on any christian board, since he would be banned within a short period of time. The one thing I learned to understand about internet boards is that you usually don't find the moderates there in great numbers. Especially when it comes to politics or religion.