The MC is pretty dense. The animals have been trapped in small cages and enclosures all of their lives, and now many of them also know their whole species are slowly going extinct, due to human actions. It's just like the gorilla said. It's no wonder if they want to slaughter some humans. It's pretty funny the MC is supposedly an animal lover, yet he believes a zoo is a splendid place for wild animals. Anyone with at least a single working eye and a brain can see animals in zoos aren't happy. They aren't any happier than humans in prisons. I have visited a number of zoos, but they are all sad places. The MC is fake. He doesn't love animals, he only wants to control them, wants them to love him because no humans loved him. I hope the elephant tells him that much, but in fact I suspect the author himself doesn't get it.