It is simply that no evidence of a God exists.
Actually, research indicates the opposite.
A large scientific study determined that veridical perception during brain-death is a scientific fact. Consciousness and awareness appeared to occur during a three-minute period when there was no heartbeat. This is paradoxical, since the brain typically ceases functioning within 20-30 seconds of the heart stopping and doesnt resume again until the heart has been restarted. Furthermore, the detailed recollections of visual awareness in this case were consistent with verified events.
Press release:
http://www.southampton.ac.uk/news/2014/10/07-worlds-largest-near-death-experiences-study.page#.VDa5LhaOqSo.
Perhaps atheists like YOU are simply refusing to acknowledge the scientific evidence for what it is??
This is not the first time that I have presented this evidence to you, RodeoX.Scientific evidence supporting near-death experiences and the afterlife:
http://www.near-death.com/science/evidence.html