I'm not a vegan and I think the article is self-aggrandizing fluff. However, this rhetorical question you pose: >Carnivores eat other animals, are they immoral

I'm not a vegan and I think the article is self-aggrandizing fluff. However, this rhetorical question you pose: >Carnivores eat other animals, are they immoral beings? Is nature immoral then? is one that has been addressed by vegans for a long time, usually on the basis of biology (carnivores are literally incapable of extracting nutritional content from plants, where we generally have that choice), intelligence (some animals are just as intelligent as young humans), and moral agency (the question of whether animals have it). I'm not saying I agree with these arguments, but they exist, and are worthy of discussion. Peter Singer's Animal Liberation is the work that explained these ideas best, much better than I could. I think it's a great read.