“Moreover, given the increasing diversity of America’s population, the dangers of sectarianism have never been greater. Whatever we once were, we are no longer just a Christian nation; we are also a Jewish nation, a Muslim nation, a Buddhist nation, a Hindu nation, and a nation of nonbelievers.”
America may have been a “Christian” nation at one time - although with the various sects, etc. it obviously was still VERY diverse in 1791 (Bill of Rights - A1: Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise therof....).
That said, I believe that America WAS founded on Christian principles, and these principles still form the backbone of our nation and guide us today. This in no way minimizes the rights of non-Christians or their influence in society or government. However, I find that people trying to undermine the influence of Christian ideas on the founding of our country are generally trying to undermine the country itself.