What I think about food is that, even though animals are being killed to give us nutrition it is still the circle of life. Back in like 3.9 million years ago during the cavemen era the way to survival was killing and eating animals. Its natures natural instinct. Animals today eat and kill other animals. Although I don't agree with adding hormones and other bad toxins in food, i think that it is completely normal to kill animals to get nutrition. But lets say we didn't kill animals, the animal population would be so huge that people would be hitting them with their cars more, and since the population is so great the food that the animals eat would go done tremendous because more and more animals are eating the food that they would suffer from starvation.
I guess the way people think about this topic is they way they were brought up. If you come from a very liberal P.E.T.A family you were probably brought up to want animals to live and not suffering making you a vegan. On the other hand if you come from a very republican family who lives in the country and hunts probably have some very different ideas.