I think they were afraid that if they left that awful rendering untouched they would end up with a Law Suit of some sort that cost them.
The Crown Prosecution Service here in the U.K took a long look at the WT article based on that phrase to see if it contravened our laws, ( and therefore European laws) on publishing Hate Speech.
The WT got away with it that time, but what if their agents, Elders etc, were not so careful how they phrased things based upon it ?
They did this because of pressure from Barbara (our hero in so many ways) and others, Cantleave, for one, stirred the pot on this one here in the U.K
They did not suddenly have a shaft of light that gave them a better rendering, no, they decided Freddie Franz's odd and poisonous one was past its sell by date.
Well done all who forced them to change !