That may have been true once upon a time, but I doubt it, and certainly not in my lifetime. Movies were made about this rough and raw in the flesh locus of the human experience. The Brit (convention "centre" let the cat out of the bag) was just trying to embellish a story, to his readers, who don't have a clue.
Isn't Algiers in the Bayou?
Whenever I heard about Algiers on NO television as I was growing up... it was always bad.
He is probably talking about when the French owned New Orleans!