How are you outraged people so sure about the casting motivations?
Were you involved in the casting? Do you have memos that dictate the requirement of casting according to a "progressive or mixed-race quota"? Are you all Hollywood insiders with direct lines to the producers of this film?
OR...
Are you just sensitive and angry about what you perceive as a shift away from the values you ascribe to and towards a world of popular culture/entertainment that is somehow lesser than the one you've circled around from your oh, so specific point of view?
I can understand the frustrations of having characters that you might adore being adapted for a new medium (though it happens with just about every single adaptation since the advent of cinema), but to put the blame so assuredly on SJWs or racial politics is just so *beep* silly!
You know nothing! Absolutely nothing! You speak from positions of authority, but have none! You are not involved in any aspect of the makings of the entertainment you seek, and, rest assured, it is simply entertainment! Put together by a small group of artists and financiers to satisfy their unique artistic and market demands! The fanbase for these books is MINUSCULE compared to what is required to get a movie sold through.
Stop speaking as though you know why things happen the way they do, because you don't! You have opinions! Small-minded, uninformed opinions!
And I say this as someone who IS actually working on an aspect of this movie, and who DOES have some firsthand knowledge of its making, and KNOWS that you're all full of *beep* Believe me or not, but I'm just exhausted by the insane amount of ignorance here (and in the world at large).