I love that one of my topics made it to 2 pages. So I'll just add fuel to the fire.
e=MC2- I don't completely understand the math behind this equation. I can't perform an experiment to prove it. But if asked, I would say that yes, I believe that e=mc2. I would even bet money on it. Is that religion? I don't think so.
The New York Giants. I belive in them. I want them to win the SuperBowl. I believe they will. Is that religion? That I think is closer to religion. My belief in their winning is more like hope. (some would say a far fetched and improbable hope) But it is a hope based on an organization, perhaps some stats, a gut feeling, and people around me who hope the same. It is not based on statistics, experimentation or any other well-established science.