The Risk of Murder in Animal Consumption

In the situation I described of raising isolated human beings until they're 18 and then killing them secretly, the thing that's wrong about that is just the fact that this might cause other human beings to be scared. You could say, you know, if we're going to begin to recognize speciesism in the way that we think, and we're kind of okay with killing animals, shouldn't we be terrified that one day we'll be okay with killing humans too? And we think, no, because we've put very strict boundaries around this, not just morally, but also legally that, sure, you can kill a pig, but you can't kill a human being.