As noted, you are posting on the U.S. Y!A forum.
Approximately 76% of Americans identify as Christian.
I would like to point out to "Iranian" that I am an American, and an atheist, and that while I may not have lived in other countries, I have spent time in ten countries on three continents. I have an education, I am a critical thinker and an avid reader, and I do not limit my reading to U.S. publications. Your implication that as an American I am inferior intellectually to non-Americans is completely unfounded and, I should add, bigoted.