I haven’t read the whole series(still on dune messiah) , but pretty much the first book is pretty heavy with the trope’y “savor complex”. The rest of the series pushes back on that in comparison. Most of caution surrounding the “messiah” themes and influence comes from Paul himself, as his abilities become more prominent and starts to notice the consequences of his actions. That’s one sequence (the tent scene) in the film they should’ve let breathe and turn down the score cause it’s seems confusing.
I don’t think the book is as heavy with the white savor, but the film was really overt with the casting choices (especially Jamis and the extras ) so I see how everyone will interpret it that way.
Herbert as very specific with the ethinicities. Those on Arrakis/Dune (Fremen) are supposed to be Arabic in descent. This is why they are black/brown folk. While they are superstitious to the point of claiming Paul as their Mahdi the point of Dune is that there is NO SAVIOR. Even the leaders that are charismatic can be dangerous and detrimental to the cause.