My story may or may not be typical. I used to believe. One day after my mother reached stage three of Alzheimer's, I went to the Bible for comfort. However, in that state of mind, I could not find it no matter how hard I searched. All the words that seemed so important before were now useless to me. (Well, most of them. I still believe that 'forgiveness' is a good thing.)
In essence, the Abrahamic God's book didn't stand up to deeper inspection. All it did was to catalogue stories that, under scrutiny, were simply repetition of older legends. But the assertions of the existence of a God, and by extension, the existence of any being or entity holding that position in ANY religion, quickly fell apart too.
My introspection and my deeper inspection of the Bible led me to realize that many religious people are very much like that old country-western song, "Looking for Love in All the Wrong Places." People are looking for cause in a universe based on probability and statistics.
The writing is decent but not great, but Jean Auel's "Earth's Children" series shows a great bit of anthropology research into ancient customs where primitive people did not understand the basic concept of reality: Stuff happens! I find that series, which is a bit boring in some parts, nonetheless captures the primitive way of thinking that every event in every life is shaped by outside forces which they tend to anthropomorphize.
The Zen viewpoint, on the other hand, looks at questions as sometimes being wrong to ask in the first place. Q: "Why did this happen to me?" A: "Because stuff happens." Any other answer is an attempt to somehow make you feel special because some magical mystical being "has a plan for you."
I am also reminded of the movie A Few Good Men and the infamous scene between Tom Cruise and Jack Nicholson: "I want the truth." "You can't handle the truth." And that statement, when transferred to people who cower in religious fear, is absolutely true. They can't handle the truth - that each of us, though perhaps special to our family and friends, is just another speck in an incomprehensibly large universe. In a small environment, we ARE special. In the greater scheme of things, we are like the countless grains of sand blowing in a desert.