It's a shame that the writer had to use his knowledge of the bible to belittle atheist.  It IS very hard to not fight back when your personal beliefs are grossly misinterpreted by those who have never seriously attempted to understand a very complex/diversified approach to Christian teaching and emphasis.

The bible was written by humans and inspired or not, it isn't the clarion voice of God that some believers feel that they alone have heard.  It only takes a quick look at Christian sects world wide, to know that each finds a different message in the same Biblical script.   

The experience of a naturalist in a wilderness situation, that point that you blend seamlessly with other living things, is very similar to a small handful of spiritual experiences that I've experienced.      The 'one true believer' syndrome is human, not holy.