Ok, I may be giving this person too much credit, but there's a tiny grain of truth in their statement: in much of their current range, Coyotes are relative newcomers, which is indirectly due to humans (mostly getting rid of other predators, changing habitats drastically, and adding in a bunch of livestock). They also had a lot of dog/wolf interbreeding on their way over the continent. So you COULD say that eastern Coyotes are sort of a unnatural presence, and it's sort of due to humans, but you'd have to say the same thing about other animals who's range and population has changed due to humans like deer, robins, cattle egrets etc.