He probably didn’t like the Islam stuff.
Absolutely— Dune paraphrases Islamic absolutism, the whole desert and “water brother” water rights, or the value of a human is in the amount of water they can have squeezed from them after death.
A kind of soylent green of water on a desert like and very much islamo Arabian desert culture. Same monomaniacal leaders like imama. And also a very techno group insulting to Catholic nuns (of higher orders btw, and the Mendelian monk orders) — the Bene Geserit mothers.
The Orange Catholic Bible?