"There's a reason we seperate Church and State. The reason for the richness and the diversity of religion in this nation is because of the seperation of Church and State, and there are people out there who can't wait to make this nation a nation of one religion... THEIR religion."

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The separation of church and state is necessary partly because if religion is good then the state shouldn't interfere with the religious vision or with the religious prophet. There must be a realm of truth beyond political competence, that's why there must be a separation of churches, but if religion is bad and a bad religion is one that gives an ultimate sanctity to some particular cause. Then religion mustn't interfere with the state - so one of the basic Democratic principles as we know it in America is the separation of church and state.

— Reinhold Niebuhr