Good post, it takes into consideration the point of view of those who don't believe.
Quite often i ask myself the same questions, and i wonder about the many ways we have to deceive ourself.
If one tries to use logic though, i find that "Pascal's wager" is correct.
In short, we cannot prove that God exists, but it's convenient to accept it does.
That said, I've seen self-proclaimed agnostics behaving like good devotees, and I've seen self-proclaimed christians behaving like criminals, and i can understand why many are so confused.