From the in-universe perspective, that of Spock's, the opposite is true, though. McCoy would be the inferior breed, the representative of the more-animal-than-man servant race that enjoys the privilege of working for the superior greenblood nobility. It's a cannon-fodder crew of "blacks" there, with one worthy "white" slumming with them for noble reasons of his own, and being quite tolerant of the racial slurs of 'em stupid niggers because naturally they just won't know any better.
Exactly spot-on. Again, it is all about PERSPECTIVES. That is probably the best summation of the likely attitude which Spock has to deal with on a ship full of humans.
I suppose if one considers he must keep his 'human-half' in check continually, I wonder if that same half of him just want to scream out in frustration about "those stupid freakin' Terrans"? LOL!