Did you become an atheist due to anti-theistic feelings or for other reasons?
I hated religion because I thought it was just mind control. I arrived at atheism because I realized that I don't believe in a god. (Robert E. Charles #444)
I was brought up in a science-oriented family, so I knew early on that the creationism and "early history" in the Old Testament was just human stories about what was thought was the beginnings of the world from people who didn't know the true origins of life on this planet, or much of any science. The church I went to (Anglican) was more oriented to the New Testament "Loving God" theme than to the sadistic "Psycho God" theme of the Old Testament. (Of course, the sadistic "Psycho God" returns and shows his true colours in the New Testament when he lets his boy get nailed to a stick, and then "forsakes" him. Hmmmm... I've always wondered about that line: "My God, my God, why hast thou forsaken me?" Does that mean Jesus died an atheist?) :-)
Regardless, there wasn't any "anti-theistic feelings" involved in me becoming an atheist, just a lack of proof and facts to back up the fantasy. It was after reading about other mythologies that I realised that they were all basically the same, an attempt to remove the finality of death, and to make a greater significance of the insignificant position humans occupy in this vast galaxy.
The only "anti-theistic feelings" I ever get are reserved for the fundamentalists/creationists who distort and deny true facts about the origins of life on this planet, and for those theists who try to use their religion to destroy, harm, threaten, or condemn other people or other people's beliefs or lack of beliefs. (Keith Brannen #713)