Or it could be because despite Gene Roddenberries altuistic apirations US TV audiences aren't nearly as so.
I doubt the demographics (people like you and me) would be able to accept people of arab decent as anything other than terrorists because the media tells you it is so and so it shall be we continue to be xenophobic and edge closer to a Fallout future than a Star Trek future.
zero-x's bitter words after his encounter with roshambo:
"I agree with you but there comes a fuckin point i dont know who roquirbo thinks he is but I at least you didnt really criticize me and i appreciate that i hate people who fuck with my ideas when i didnt say shit to em and yes he is the kind of guy i would take a scalpel tear his head open the take an hammer use the end to samsh through the medulla and use the nail pull as a pry to pull back the top of the skull revealing a brain (small but brain nontheless)and take desert eagle magnum and blow it through his fucking spine as he still breath and then rip out his heart and show him how black it is before he dies but as you said thats illegal well cya"