Dune is definitely inspired by middle east colonialism.
I'm not convinced on your take that the secret society of witches are a jewish allegory, or that the final outcome of Dune qualifies as a "Bene Gesserit controlled state of Arrakis". I think you're reaching here and walking into some classic conspiracy theories.
This is wrong. The novel is heavily influenced by the book The Sabres of Paradise which is a biography of a muslim leader that united the Caucasian tribes to resist Russian colonialism in the early 1900s, and there is a wide range of themes and influences that Herbert and his son have talked about. Recency bias is making your analysis overly simplistic.
I would agree that for a lot of people Denis Villeneuve's direction is rather sleep-inducing. I remember going with friends to see Blade Runner 2049 and the friends went to sleep. It is usually the case with atmosphere-heavy and subtext heavy movies. Another example of a similar director would be Nicolas Winding Refn. Who deliberately sometimes refuses to engage the audience. Instead you are stuck with a few minutes long closeup of the character thinking about something.
I think those kinds of films are not for all people. But those that love this aesthetic love it a lot.