As per the definition of Katherine Stewart in her book The Power Worshippers, Christian nationalism is based upon the myth that the American republic was created and founded as a Christian nation, and as such, the legitimate government “rests not on the consent of the governed but on adherence to the doctrines of a specific religious, ethnic, and cultural heritage.”
Under this definition, the laws of the land should not be based upon deliberation of democratic institutions, but upon idiosyncratic interpretations of the Bible. . . . The belief that America has always been and remains a Christian nation is not an idea that is held solely by self-described Christian nationalists. The Public Religion Research Institute found that almost one third of Americans believe this, and that four in ten Americans believe America was a Christian nation but no longer is.
Read the full article on H-Nationalism.