Sorry, can't defend this. This is not little spanking. It's a clear case of battery (see above).
However, what would self-hating whites call the boy's father? White Trash perhaps? Possibly African-American White Trash?
And I can't wait to hear more about Gypsies.
Since I'm not a "self-hating white," I wouldn't know.
But I would call Moody (who's the step-father, not the father) a knuckle-dragging slope who has no business being around anybody's children.
This abuse is the kind of thing that inspires children to grow up to kill their parents.