Mostly because it riles up people. Someone in office who is there for the good of the people shouldn't care about that sort of thing for the sake of his selfish desires.
When people are representing a belief or lack thereof, they are responsible for the reception. Some religious people have been tempered to believe that atheism, agnosticism and anyone not mono/polytheistic are going to be arrogant, mean spirited, bitter and "know-it-all's". There are relevant reasons for this, just like there are relevant reasons for non-religious folk feeling the same prejudice toward religious.
This kind of shallow thinking is what's furthering the discrimination against non-religious people.
When people are representing a belief or lack thereof, they are responsible for the reception. Some religious people have been tempered to believe that atheism, agnosticism and anyone not mono/polytheistic are going to be arrogant, mean spirited, bitter and "know-it-all's". There are relevant reasons for this, just like there are relevant reasons for non-religious folk feeling the same prejudice toward religious.
This kind of shallow thinking is what's furthering the discrimination against non-religious people.