A bit off topic. But since you mentioned West Point - there is a book by John Feinstein written within the last couple years, about Dean, K, and Jimmy V. I can't recall the title, but its pretty good, about these three coaches climb in ACC, personalities, struggles, conflicts with each other, rivalries and eventual friendships.
A quote from K was about how livid he (Army) would be if they ever lost to Navy. "We are Army. We NEVER EVER lose to Navy. Never." It was near life or death for K. He was so obsessed with it.
I just assume when Duke plays UNC, K sees UNC / Roy as Navy, and Duke as Army. A battle of the utmost importance for him. I just don't buy that Roy sees these matchups with anything near that level of importance, obsession, hatred.