I'm sorry but that article proves nothing when dealing with a divisional rivalry.
Saints fans aren't even close to the "nicest" when dealing with Panthers fans (or Falcons fans...or Bucc fans). Similarly our fans don't tend to be terribly personable when dealing with your fans or other NFCS fans. Yes Saints fans are mega douchebags to us and our team...and lots of us tend to be mega douchebags when dealing with the Saints and their fans. It's a generalization but it's just how it is. (and yes there was cheering when Cam was hurt last year).
I'll bet your fans are pretty OK when dealing with a traditionally awful non-conference opponent. Ours are too. Bet if they sport a NFCS jersey and go to one of those games they'll have a different experience.
I hate the Falcons WAY more than I hate you guys, and I am willing to bet most Saints fans feel the same way. For the opening game there was nothing but hype for it, with Payton returning and Atlanta coming off a 13-3 season.
There were no problems at all between the fans. You'll run into some rude people anywhere you go, but even for a divisional game it was tame as far as interacting with them. We would talk trash to you guys or anyone else, but give you some food and beer as well if you're tailgating. At least that's how the people I'm around are. It's just a football game, we are there for entertainment and to cheer for our teams. You can be a loud, passionate fan base, and also be civilized.
Tourism pays for New Orleans, and we welcome anyone that is respectful.