What event, book, lecture, or insight 'made' you and atheist? HMM?
While he was sick with cancer my dad once cut my religious comments off by saying, "I don't believe in that stuff." It was like a thunderclap at the very moment he said he didn't believe. I no longer believed. I had essentially been given permission to leave god. I had flirted with it before but it was just too far a leap for me. His moment of honesty gave me permission. After watching my parents suffer from cancer several times I had no more doubts that there was no god. I'd always been distressed, especially as a child, that god would let so many people suffer for no apparent reason. Watching them suffer and watching everyone pray and work to make their last days better clinched it. How could a loving god do this? If god was so sadistic it wasn't worth worship even if it was real. A lot of it is luck from cradle to grave. No one is looking at you from heaven. I could finally have some privacy.
Before he died he went back to his childhood beliefs and I feel they gave him comfort and strength. I do not look down on him for this. He gave me the gift of freedom first. Thanks Dad!