Professor Jay explains the differences in how the topic of slavery and other political hot-button issues were addressed from the pulpits in the North as opposed to how the same subjects were discussed from the pulpits in the South. Primarily, how the Northern preachers would twist and rend the scripture to conform them to their political opinion whereas Southern preachers would conform their political opinions to the literal interpretation of scripture. There were also serious differences of theology between the Northern and Southern churches with the contributions of Southern theologians primarily overlooked in the modern-day discussions of theological arguments.
Puritanism, which bred the "Yankee" mindset, had within it the seeds of the nation's destruction and lent itself to "Social Justice" movements that are not very unlike the "Social Justice" movements on the political left today.
Also discussed are how and why educational institutions move leftward. How conservatives start schools, the liberals over-run them, the cycle repeats. Conservative denominations like the Southern Baptist Convention may have saved their seminaries from liberalism in the late 20th century only to lose them to post-modernism in the 21st. Southern Baptist leadership are actively intimidating and even attacking conservative teachers and leaders who are politically conservative and especially those that are pro-Southern.
Professor Jay and Dr. Ed give specific examples of this. Basically, there is no middle-ground in the culture war. Once you are determined by the leftists to not be in their camp you will not be allowed to rest until you have been silenced. Hence, Dr. Ed's "bull in the China shop" approach. Why when the left gets louder, we get louder.