And not race. I assume you are not saying that there is something wrong with black people, even though that is easily read into your post. There is a big difference being a historically persecuted minority group and being the historically advantaged majority. If you can't understand that, then I don't know what to tell you.
I would suggest that, if thousands of people were crammed into a steaming hot, water-free place for days, surrounded by water, the bad elements in even your precious Fargo might just tend to take out frustrations on minorities. Your perception as a white majority member just might not match that of a black minority member. A crazy thought, I know.
Disasters bring out the best in good people, and the worst in bad people.
As to the details of your post, it is all basically nonsense. The initial reports of violence in the Superdome, we know now, were wildly exaggerated. It was chaos and hellish, but there were no murders or child rapes or whatever. Three people died - two elderly people and one suicide. There were no confirmed sexual assaults. It was all rumor.
These rumors are natural during chaos, I suppose, but they were given respectability by our utterly incompetent police chief, Eddie Compass, and Mayor, Ray Nagin, on Oprah. Both of those clowns were revealed as absolutely unprepared, in every way, for the disaster. People panicked....but most of the violence was mythological.
Of course there were bad apples at the Superdome, since they were generally the poorest of the poor. But the people there were not all black. And of course foreigners felt scared. But they were in no actual danger, we now know.
Link: http://www.slate.com/articles/news_and_politics/politics/2015/08/hurricane_katrina_10_years_later_the_myths_that_persist_debunked.html