I grew up staunchly athiest due to fear that the Christofascist "version" of G-d would read my mind and see that I'm a sinner. My extended family is Christian, and I live in a conservative area, but my parents were athiest/agnostic (supposedly, one lied to me all the time as a kid).
I just stuck my head in the sand like "If G-d doesn't exist, he can't see the horrific intrusive thoughts and memories I experience every day, or judge me for being a sinner!" Considering I was abused as a kid, it makes sense. I also know that I may have repressed memories about more religious trauma, but no lead yet.
As you can see by my "censoring" of G-d's name... I'm no longer atheist! I decided to follow the path of my Jewish family members. I like it much better than whatever cult-like bullshit bastardization of G-d that the conservatives were pushing.