>>individual freedom; and, competition
How do these derive from Christianity?
There is probably more emphasis on them in Norse mythology.
Because he is speaking about Christian Nationalism, not Christianity.
The colonists who eventually created the USA spent 150 years developing the principles of Christian individual rights and private enterprise before incorporating them into our Constitutional order. They debated and wrote extensively about what they were doing and why. Many, many books have been written on this subject. Anyone who genuinely chooses to understand this subject can readily find the answers they're looking for.
https://www.amazon.com/Did-America-Have-Christian-Founding/dp/1400211107
I wrote “Western Civilization”, not “Christianity”. These are not synonyms.
That said, while some forms of Christianity are socialistic, the Reformation and Protestantism were built around individualism. Calvinism and its derivatives have a strong tilt towards capitalism and a competitive society.
But I had in mind not religion but the Western development of science and reason in the late Renaissance and Enlightenment, culminating in the proto “liberal” world view that gave birth to the American Revolution, republican government, and the US Constitution. The manifold ramifications of a competitive society and the institutions that support it are the reason modern industry, agriculture, and medicine produce mass quantities of cheap goods, food, miraculous health care, etc., that allow the world’s population to exist at current levels. Rid us of the “evils” (competitive capitalism and individual liberty) of “Western Civilization” and the world could support perhaps an eighth of its current population, and even that in precarious destitution. Perhaps critics of Western Civ desire an immense die-off.