trevanian
Rear Admiral
A bigoted crew member wanting Romulan ass?
Stiles, "Balance of Terror" (TOS)
You are absolutely right. I had forgotten that. I think I was focusing too much on the premise that in the Star Trek universe prejudice was a thing of the past.
I haven't seen the movie, so forgive me for injecting this viewpoint into the thread. But Stiles' motivation was a long family history, which is certainly as valid a motivation as any for characters in drama. As for the guy sitting next to wannabeKirk in the clip from Abrams, he strikes me as jingoisitic, making a comment in more of a 'I want RED DAWN to happen so I can realize my potential' kind of way, not as a serious valid character motivation.
Probably less motivated even than the assassins in TUC, who previously set the bar pretty low for the 'enlist in starfleet' / best o' the best tradition.