Extreme moral relativism

So Morrissey (singer - formerly of The Smiths) says that killing a stag is like killing a child.
Such extreme moral raltivism is very worrying. Morrissey is, of course, saying that to kill a stag is just as serious as killing a child.
But what if you're a huntin', shootin', fishin' kind of guy and you take it the other way round? To kill a child is only the same as killing a stag...