Because that end of the conservative spectrum would believe GW if he assured them that the sun will rise in the west tomorrow. Incapable of independent rational thought, they, like the brain-dead dittoheads lifting their arms in salute to Herr Limbaugh, are led around like a barn horse.
Or maybe it's because the "intellectual" conservatives have bought into the liberal-left, elitist, arrogant, effete, fear-mongering, propaganda that the Christians have a dangerous agenda and are weak minded?