It is undeniable that any change to the Pledge of Allegiance will be met with resistance from strong patriots who believe it should never be changed.  This change would be associated with and blamed on atheists and non-Christian religious people, thus causing animosity towards them on the part of people who would have otherwise been indifferent towards them.  National pride will, therefore, be associated with Christianity, as opposed to atheism or other religions, to an even greater extent than it is under the status quo.