Dune 2.
I read a film review post about above film on a sadbook, and a person stated in the posts that
"it wasn't culturally represented" with the choice of actors.
The replies were funny.
They again defended their post stating that as the author drew his storyline from "the middle east" they should have been more representation from that area and religion (never read the books, so assuming that the religion was Islamic).
I left it there as it went from funnily interesting to not.
It's not funny, it's sad. The books were set
on a different planet, and the culture is "desert dwelling". Islam is not mentioned in the books, but (presumably) the author wrote from the only desert dwellers with which he was familiar; hence water preservation, (semi-) nomadic life and covered bodies. The religion in the books (and thus the movies) is based on the Bene Gesserit (the "witches") way, and is explicitly stated to have been implanted to ease the way for a supposed future "saviour".
Because it was set in a sandy place, some folk (including, probably, the director and some of the other movie folk) have drawn parallels with Arab culture, but why this should mean that the actors should be "culturally representative" is completely beyond sense. ... although I presume the same should be true of Tatooine.