I think he's referring to hypocrisy i.e. someone who thinks it is immoral to kill cattle but still eats steak.
Or someone who thinks it's immoral for someone else to kill to rescue another but would want that someone else to kill if he was the one needing rescue.
It’s a bad metaphor for what he’s trying to say. The issue of the Death Penalty would have provided a clearer example.
I don’t know of these people who find it immoral to kill animals for food yet eat them.
I do find people who find it immoral to kill animals for food or clothing and who only eat veggies.
I do find people who are UNwilling to confront themselves with the aftermath of abortions (aborted fetuses) and yet who insist that it is just tissue and not human.