The Gallup Poll says more than 90 percent of Americans believe in some kind of God, but more and more don't identify with any particular denomination. Maybe that's why there's increasing tolerance of one group for another. Religion can be a unifying force in America. It can also be divisive, and the more isolated one religion becomes the less acceptable it is to the others. How do "outsider" or "fringe" groups affect other religions? And how does religion relate to politics, gender, race and even geography?