Little Nipper
SO, why are they not investigating ALL possibilities? Why are secular values considered more relavant than the spiritual? My guess is that most people don't wish to prove God exists, because it makes them uncomfortable with the choices they make in life. It is far "cheeper" and easier to proclaim innocence through not knowing. Unfortunitly, this will not work!
One very good book that could answer your questions sincerely if you are so inclined is Michael Martin. The name of his book is "Atheism a Philosophical Justification". So there you go there's a source for you to get into that could answer your questions.