There is certainly human wisdom to be found in many religions, but they are also repositories of human weakness. At their worst, religions represent the institutionalization of In-group Out-group distinctions. Fear of the Other is an instinct older than humankind, but we have outlived any selective advantage it once conferred. We must remember that for much of their histories the major monotheistic religions enforced their calls to universality and transcendence with the sword and with fire.
These past ten years our country's Global War on Terror has drawn its strength, funding, and authority from Fear of the Other. We have killed the innocent and betrayed our commitment to justice to defend the interests of those in authority. While doing so, these authorities cloaked killing, torture, and lies in the rhetoric of Fear of the Other. In our pride and conceit, with moral certitude that our cause is just and preeminent, we have made sharing a ride, or a meal, or a roof with a high value target a death sentence for many women and children, whose numbers go uncounted because they are Other.
Our taxicabs are driven, our meals are prepared, and our roofs are repaired by brown-skinned poor people who don't speak English very well. Some Americans know their own and would rather these Other people not be here. Alone among Western countries, in the USA the quality of our health care is determined by whether we have a job and by our ability to purchase benefits and pay deductibles. There are Americans who think that is the way it should be, because they have theirs and the Others could have their own if only they worked hard enough.
When you celebrate the story of the angel of death passing over your home to instead kill other children is your faith community celebrating its In-Group status? When you rejoice in your savior's victory over death (which should have been a forgone conclusion if the rest of the story is true) as proof that the only path to eternal salvation is to worship your particular god in your particular way have you drawn a line between Us and Them?
Image from http://en.wikipedia.org/wiki/Washington_National_Cathedral