I actually read a study some years back that referenced how soldiers dying in the battlefield often call out for their mother. It's as if the stress of war and dying is so great that the mind will sometimes regress and long for the protection of the person who provided safety during the years when he needed it most.
I tend to think, on some level, that's the exact same role that god plays for most people who follow a religion like Christianity. That's where this need probably comes from. The more extreme groups like Christian or Muslim fundamentalists even act children; everything in their world tends to be "all good" or "all bad," they're often fearful of the big scary boogeyman world and believe everyone else is out to persecute them, etc.
I think another poster mentioned that institutionalized religion has always led to intolerance, violence, widespread ignorance, etc., and I agree. I'm still not clear on what the OP meant on returning to "spirituality" either. Could you maybe clarify for me?