I agree that Stiles' motivation was, shall we say, a bit obscure, but just for the sake of discussion...
Two or three years ago, we visited Shiloh, Tennessee, site in 1862 of a pivotal battle in the U.S. Civil War .*
* Explanation included for the benefit of non-USofAns
After visiting the battlefield (strongly recommended for anybody interested in the Civil War, BTW), we visited a shop that sold relics.
Well, the old guy who sold us a "Yankee" relic talked as though the Civil War had ended maybe 2 years before, as though Yankees had killed his daddy, raped his sister and stolen the family's mule. I am, I swear, not exaggerating. To him, it was recent history. And this even though he knew perfectly well that we pretty much qualified as Yankees, too. He was nice to us, because we were customers and because he wasn't an unkind man (and besides, I went out of my way to mention that I have Southern relatives - my momma didn't raise no fool), but...
He even, and I swear I am not exaggerating about this either, kind of tried to convert us to the Confederacy.
Since I have Southern relatives, including some who do still refer to people as "Yankees," I wasn't too surprised. My husband, however, whose entire family is from the Midwest and who hasn't ever been called a Yankee before, was not amused. But to me it was very funny and very interesting, though more than a bit odd.
So anyway, is Stiles' attitude that far off from the old guy in Shiloh? He was still extremely bitter about events that had occurred 140 years before, and while his may be a somewhat exaggerated attitude, it definitely isn't unique, not in some parts of the South.