I've been watching the original Star Trek with William Shatner, Deforest Kelly and Leonard Nimoy and I've spent a lot of time wondering why is Bones such a dick to Spock, because he is. I think for him it kind of amounts to Bones being racist - or speciest - against all non-humans. But seeing how Spock is treated by the other characters, he gets more shit for being part Vulcan than Uhura gets for being black. The way the character talk about Spock is reminiscent of how mixed race black/white people would be referred to.
Spock refers to himself more often as being Vulcan and and how he was raised like a Vulcan. Other characters react to his Vulcan-ness as a negative. Vulcans are critical of his humanity, which isn't visible and seems to be known to everyone everywhere. The humans on the Enterprise refer to his Vulcanity as a horrible negative, except for Kirk but bros. It makes me think of how in at least America if not other western cultures, if a white person and non-white person have a child the resulting mixed race child seems to more often being referred as being a member of the race that 'sullied' the white race. It's up there with the need to call black people 'black American' or 'African-American' and that white Americans are rarely defined as being anything other than American. It's not English-American or French-American, just American. Spock is often referred to as being just half Vulcan and half human and there's often a coda added if anyone says he may be just one.
In this fashion It's easy to see him as being a "black dude" because what he is has to be known. It can't just be accepted that he exists and has some of each. Also, if he's ever insulted by humans they say 'Vulcan' as if it's a bad thing. Multiple episodes bring up how 'devil-like' his ears are and how evil he is or seems. Other aliens including the Vulcans, Romulans, and Klingons have brought up his human side as being the negative more often, but those species generally have a thing about disliking humans.
But what makes him magical? The Vulcan talents. Mind-reading, mind-meld and the trained nerve-pinch. Spock has been able to survive toxins and has a moderately different biological make up but conveniently looks like a white dude. I personally add him to the magical-black-character trope because while he's not black he is often treated in a similar fashion to regular MBDs. He's wise even though he's young, he has a special way with animals (sometimes) but the regulated normal human characters treat him as an Other while relying on him to save them time and time again. Spock is relegated as a valuable character because of the services he can perform for the other characters (namely Kirk, McCoy and Scotty) unlike Uhura, Chekov and Sulu who are just accepted as 'normal' and their racial differences are never brought up as a negative. Chekov has Russia-pride up the wazu, but the other characters don't turn to him to figure something out because he's Russian. What he is isn't used as the basis to his function, unlike the MBD who is useful by existing in the narrative.
And this brings me back to Bones being racist, because in EVERY situation that's emotional he tries to crack wise about Spock not being affected by is because he's Vulcan. Bones seeks to cut and hack at Spock at every opportunity, to dismiss him and then fight him decide that his 'emotionless' Vulcaness will lead to the collective team's downfall. Time and time again Spock calmly reminds them that he's part-human and ought to be treated like the rest, but also that he cares he just doens't express it. Spock takes shit and has the presence to dismiss it, forgive it and be the better character. He doggedly follows and chases Kirk, is fiercely loyal to him, and puts up with everything McCoy says with passive disinterest.
Sometimes it just seems like Spock was written as being subservient to everyone else just because he's different. But in the Star Trek universe, class is made up on levels of humanity (especially Caucasoid humanity in The Original Series), then through humanoid life forms and non-humanoid lifeforms (which there are minimal). It's like the black character being written into a movie and they're great at dancing, was possibly a thug as a youth, and is a star athlete (if they're male), but they have experience and wisdom to help the white character succeed. And he's the token character, he's the only alien consistently in the show.
I might be stretching this a little, but there are parallels to how Spock is treated and with how black characters in media are (but especially were) often treated. I did mention Uhura and Sulu, and it's interesting that they're the only consistent non-white humans, and once Chekov was added he went off on more expeditions than Sulu had or Uhura had and he was the newest crew addition. But in terms of being discriminated against, with Sulu and Uhura it's never because of their race, with Spock it's always because of his race.
Is it fair for me to be this critical of old media, in a way yes. I know there are more seasons and newer Star Treks that have greater racial diversity and less black-face, but seeing how a character is singled out as being Other because of their species can still happen. I've seen the two new movies and I did wonder why there were so few other aliens presented. I think I wrote somewhere that with Into Darkness, it's Spock, we see one Klingon for a moment, the dude that hangs out with Scotty, a tribble and I think there were one or two shoved into the background. If this is supposed to be about and take place in a species-integrated future, where are the varieties, other than painting white chicks green? (Not really counting Khan because he's a race of super-humans from how ST:TOS described him - and he was just another white dude.) Tokenism can still happen and it happening with species and not race doesn't make it better.