I see a lot of confusion here between a predator and an obligate carnivore. A predator is an animal who would naturally prey on other animals for all or a portion of it's food. An obligate carnivore is an animal who is physiologically dependent on nutrients found only from animal sources.
Vultures are obligate carnivores yet they rarely prey on animals in favor of scavenging. A lion is an obligate carnivore who will prey or scavenge depending on what's easier. A bear is an omnivore but is anyone here going to argue that a Grizzly isn't a predator as well? Rats are another example of predators who are also omnivores. Many people who have kept both pet rats and pet mice know what I mean! Chimps are another example of omnivorous predators.
My dogs are not allowed to run the neighborhood preying on cats, squirrels, and lizards for their dinner. Does that make them any less the predator? Does that mean that a meat based diet isn't healthiest for them? Humans are omnivores and our natural state is one of a predator and sometimes a scavenger. Buying food from the grocery store or hunting it down and killing it with our bare hands makes no difference to that.