1) People have a right to assign labels to themselves rather than have labels assigned to them, yet are asked to explain and defend their arguments in forums such as this one.
2) As a self professed believer, I have chosen the label because I feel that belief is a healthy part of holistic health. I cannot know that God exists, and I choose not to claim enough evidence that He does not, based on my world view.
3) Strong atheists, such as Straggler and/or Crashfrog seem to force people to accept the logic of atheism as a sane choice.
The evidence is more on the side of a God or gods being entirely products of the human mind. Some folks prefer to embrace an illogical belief for whatever reasons. Perhaps they see the belief as a sort of mental pacifier. Perhaps they experienced an emotional event or series of events that reinforced their desire to believe. Perhaps they refuse to throw away their faith and belief because they feel that it is better to hold on to it, for their world view and mental health.
how is it even possible that such a concept can have originated as a result of anything but the internal workings of the human mind?