Lol, I remember that myself. Changing the words to the nauseating, mindless fairytale garbage I was pushed to sing in school.
As if teaching kids about how good it was for some preacher man to be backstabbed, and subsequently subjected to a showtrial, made to carry the instrument of his own torture/execution to the place of execution, and thence nailed to a piece of wood and left to die is appropriate in the first place.
Maybe if they were to do it with our politicians yes, but not as a rule. Such things are, IMO, a little distasteful.
Although I suppose at least it aint catholicism, teaching the wee ones to eat human flesh, and drink the blood of martyrs