system
Given the following post, respond as if you're commenting on Reddit:
human
[Dune] Why are the members house Harkonnen such assholes?

Basically the title. I do not remember if an explanation was ever given. Were they just evil for the sake of providing an enemy for the plot, or were they motivated by something where they thought they were doing the right thing?
gpt
The Bene Gesserit had been intentionally cultivating these attributes for years. The Atredies house was bred to have all that was noble and pure; the Harkonnen to have all that was ignoble and devious. Combining the two branches was their ultimate aim, to reconcile these two human divisions with the birth of the Kwisatz Haderach.