Just my own very humble opinion ,but for many people belief in God is complicated ,it's not a yes \no question ,it would take longer than the reply box on a tinterweb forum to clarify how you feel ,for me personally it's not private or secret how I feel ,it's just not easy to describe in a few dozen words ,
For what it's worth I have a theory that most atheists are against organised religions ( and understandably so )than against the idea of people having a spiritual side .