I've often wondered if this an outgrowth of the feelings of triviality and hopelessness that the assumption No God engenders. As my close friend put it, shortly before he committed suicide, 'Have you ever stopped to think of it? We are all microscopic specs in a macrocosmic universe.'
Godman
J'C: I am truly sorry to hear about the suicide of your friend. Assuming for the moment that your friend was a considered atheist and not a failed theist, the feelings of triviality and hopelessness are rare and generally temporary in new atheists. Generally atheists find hope and meaning in the society of their friends, but occasionally that society is religious which rejects and casts out a fresh non-believer. This is common not only for atheism but other rejections of dogma that cause a bigoted rejection of the person. Denying a person the fellowship of herm church for doctrinal reasons is an all too common cause of suicide. See the Christianity and Homosexuality board for examples of near suicides for this reason.
It never ceases to amaze me that certain religions are so concerned with their dogma that they will sacrifice their young that reject that dogma. Shunning, excommunication, whatever they call it deprives a young person of the social connections that have made herm life meaningful for much of herm life, and suicide is an all too common reaction to that rejection. I wonder how many of the "unexplained" teen suicides are really explainable by religious rejection for one reason or another. Homosexuality and atheism being the most common causes. Don't expect the kid's church to apologize they would claim that they were just trying to help herm comply with herm faith. Gut-wrenching is way to weak a word.