If we all lived the hunter gatherer lifestyle still, we wouldn't have a problem killing animals for food.
That quote made some very exaggerated claims also. Of course we won't pounce on a chipmunk and rip it limb from limb with our teeth if we see it. Not only are chipmunks not part of our diet, but we don't hunt and eat that way. We hunt bigger animals, and as shown in the video we can do it with purely our physical attributes. When humans kill, they bring it back to the village and share with the family. The only time anyone would see a chipmunk and pounce on it, is if they were lost in the woods all by themselves, and were starving.
So, just because we live in a modern lifestyle now where we don't need to kill animals ourselves, doesn't mean our body's design has suddenly changed to where we don't need meat. The fact that our ancestors ate meat and were "hunter gatherers", proves that we are omnivores. I don't see how anybody could possibly debate against it.