And the truly beautiful unpigs were shipped off to a separate place to live because the pigs could not bear to look at them.
Here we are again today. Pig is the height of desirable and beautiful. Unpig is not tolerable and so one by one the unpigs are done away with so that the pigs will not find anything offensive to upset them.
Truth is stranger than fiction. Or fiction is a window into future truth.
If you look like a pig and act like one you are safe with donald the duck. If you are an unpig in appearance and actions/activities you are destined for doom.