Southerners in general are not known for their warm affection toward those they consider to be "Yankees," which for some can be anyone born or living outside of the southeast quadrant of the country. In particular they do not tend to hold residents of New York City in the greatest esteem. I admit to having a stereotype along those lines: the native New Yorker who taught (journalism, I think) at the University of Alabama when I was working in a bookstore just off campus, and fixed my impression of him by standing at one end of the counter while I was dealing with a customer at the other end, banging on the counter with the newspaper he wanted to buy and braying "Hey! ya wanna take care a this?!?" *
Even before that I had taken as my own the title of a Buck Owens song: "I Wouldn't Live In New York City (If They Gave Me the Whole Dang Town)".
No, not really. I mean, sort of. It's true that I would not at all like to live in New York City, but that has more to do with my general dislike of big cities than with any particular defects of New York. I wouldn't want to live in Atlanta, either. I spent a memorable week or so in New York when I was a teenager--I actually saw folk singers in Greenwich Village--and there was a time when I wanted to go back. But the only time I ever have was an overnight work-related trip sometime in the 1980s.
And of course it is well known that many New Yorkers hold the South in great contempt, which of course only makes the Southerner more resentful. Yet when 9/11 happened, Southerners were as outraged as anybody, volunteered to go and help, volunteered to join the military to help avenge the attacks and prevent future ones (which is not to say that the wars that followed were wise or just).
I remember thinking at the time that in spite of all the regional animosity, which was partly in jest anyway, people here in the South, and elsewhere, nevertheless viewed the city as in some sense America's city, and were as outraged by the crime as they would have been if it had happened to them or to some place much closer to them, both geographically and culturally.
I'm not sure that it would be the same if something similar happened now. The country was bitterly divided during the '80s and '90s, but not so much that we didn't come together in the face of the 9/11 attack. Now the division is more intense, with genuine bitter hatred and contempt boiling on both sides. America's major cities now are seen as the chief source of hostility and disdain for much of the rest of the country, for what is still called Middle America, though somewhat implausibly. If a major attack or some other disaster happened to New York City now, would the rest of the country rally around as it did 19 years ago? Or would most people say "Gosh, that's awful, glad it wasn't us" and go about their business? I hope there wouldn't be many who would say "They had it coming," but there would be some.
And of course it goes the other way, too. There are no specific major symbolic locations that define "red America," so a single huge event like 9/11 directed at it is hard to imagine. But I've seen plenty of more petty reactions to bad things happening in the South or other less enlightened parts of the country: "They voted for Trump; they deserve whatever they get."
It's hard to imagine the return of that brief post-9/11 unity. Almost every presidential election since 1980 has aggravated our divisions, and it gets worse every time. We can be sure that it will after this next one.
* Note added a couple of days after this post: I've been thinking about this incident and am pretty sure I've exaggerated it. He was a bit rude, and that's why it stuck in my memory. But when I replay it in my mind I feel a bit sheepish: it wasn't that bad.