Have you thought about the ones that never "believed" in a deity to begin with; how are they to fall away or dismiss something that was never part of their lives to begin with? How can they lose faith in something they never chose to have in their life? Sounds to me you are pushing your faith on people and asking for an explanation in return.
Personally, I am an agnostic atheist and will remain that way until the end of my allotted time. Why? It is my choice and no one person can change it regardless of how hard they try.
Question to you. How do you know YOUR religion is the right one?