I think that the more common aspect of all of this is that we look at certain animals as a source for food. Cows, lamb, duck, turkey, alligator and crocodile among some others. While other animals we don't see as being appetizing, dog, cat, kangaroo, snake, horse, and ostrich. While certain cultures that have largely remained in their surrounding areas or have limited interaction with another culture tend to have in what we perceive as having strange or even disgusting dishes, they on the other hand view it as normal and as a delicacy.
Before the modern age, we had to spend countless weeks, months or even years in visiting far off places. Now we can spend a few hours and dine on intestine stew in India (made up food, not sure if real) and return back home to have a hamburger.
Guessing what I'm getting at here in my rambling post is that for the first people that looked at a certain animal and thought "that would be a tasty meal", and to have it spread as more and more people tried it and enjoyed it. There will always be a segment of the population that would enjoy the meat from one animal as the other portion would look at them with some level of disgust.
