More thoughts on ideology and zealotry. Bill Moyers's fears are, in my opinion, entirely justified:

there is an even harder challenge - to pierce the ideology that governs official policy today. One of the biggest changes in politics in my lifetime is that the delusional is no longer marginal. It has come in from the fringe, to sit in the seat of power in the oval office and in Congress. For the first time in our history, ideology and theology hold a monopoly of power in Washington. Theology asserts propositions that cannot be proven true; ideologues hold stoutly to a world view despite being contradicted by what is generally accepted as reality.

Read the whole thing.