Well, since humans are responsible for releasing cats onto the landscape, then this is just one more thing humans can add to the list of destruction that they do. Nobody is blaming the cats for hunting, something they do instinctively. We are blaming humans who are irresponsible owners and humans like you who know cats hunt and STILL continue to toss invasive predators back into the environment.
As my friend would ask, "killed cats still hunt...??"