A history professor is backing recent comments from Russell Moore, president of the Ethics and Religious Liberty Commission of the Southern Baptist Convention, who has claimed that America is not a Christian nation in the sense that many believe it to be.“If what you mean by that is that a nation in which most of the people profess to be Christians, then, certainly, the United States of America was — and is — a Christian nation, based upon that sociological definition of a ‘Christian nation,’” Moore recently said.