They have to finger point, because this country is made up of a majority of Christians. To not scapegoat the atheists would be tantamount to admitting that god could be upset with the people that claim to speak in his name, so they have to convince themselves that all our problems are a result of their unwillingness to purge the atheists and the liberal Christians that advocate secularism.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell