Originally Posted by JanisElizabeth:
“I agree it was very typically nasty Helen but I have to say with regard to that name everyone thought it was hilarious when someone (maybe Anthony) referred to Craig by that same name.”
He was justified in making a ridiculous comparison (in terms of respective crimes) because he was personally affected, was exasperated, and was obviously exaggerating for comic effect.
Plus Craig did actually look like Hindley.
Helen, on the other hand, made the comparison because she has probably used that line many times before. She doesn't need to do this because in the moment she can be quite witty.