The article is saying that these sharks aren't really sharking though. The sharks behavior has been changed by environmental factors (regular human feeding and humans raising the local sea temperature by dumping warm water from the desalination plant).

1. Sharks are attracted by usually warm water from desalination plant.
2. Tourist guide boats start chumming the waters to keep the sharks around for tourists.
3. The attraction of so many mostly harmless sharks changes their feeding dynamic. Ever tried eating an ice cream cone near a small child? Ever tried pushing an ice cream cart through a crowd of small kids? Way different dynamic as supply and demand changes as the crowd grows.
4. Formerly mostly harmless and "shy around humans" sharks start directly approaching humans as a source of food.
5. Sharks investigate human, beg for food. How do sharks investigate? By biting, nibbles really, or bumping into people swimming.
6. The first bite generates a predictably violent reaction from the humans, which triggers a feeding frenzy response. Humans aren't equipped to defend or escape this.

The point is that at every step of the way, these sharks are acting in a very strange way (for them) as a direct result of human action. We've seen this kind of thing before when people feed wild animals, strange and dangerous human seeking behaviors develop: alligators, bears, moose, etc. Dangerous animals? Yes, but the behaviors that result in human deaths are in no way natural.