“Wrath” really only directly referred to the giant zombie pack during that one scene, and while we’re taking Greg Nicotero’s words to EW at face value, isn’t it too peculiar a thing for that herd to show up merely as a vague warning to Rick’s crew that in-fighting is bad?
For those who are unfamiliar, The Whisperers are the deadly group that showed up following the comic book’s post-War time jump.
Especially considering every giant walker swarm has stood for that same thing in the past, from the Alexandria breach to Negan and Gabriel’s gut-covered escape.
Their main gimmick involves its members wearing walker skins as if they are full-bodied costumes, making them blend into big herds like this, and allowing them to travel largely undetected.