Maybe because Bones and Spock are friends
You guys keep saying that but in these movies they are never showed being friends and perhaps, as the cast suggests, this should be the movie where they at least develop a mutual understanding of each other.
Are you sure you aren't all projecting tos on these characters?
From that clip alone and all the scenes these two have in the movies, I honestly don't think that the people I read who think that Bones is just being a jerk with Spock are more unfounded in that interpretation than those who justify him calling him the friend.
The flaw in this argument is also maybe assuming that the characters are infallible without taking into consideration that maybe this is a scene from the beginning that will help conveying the whole character development thing the moment you see, in the end, Bones acting, maybe, differently.
and Bones has lived in close proximity with Spock and Uhura and knows how their prior arguments and issues have gone? A ship is like a small community with no secrets, so Spock and Uhura's relationship would be part of the scuttlebutt of the crew.
Plausible, but it goes both ways: if he knows them he should maybe also know how much they mean to each other and thus how gratuitous it's for him to make that comment right when Spock possibly feels like shit.
Lots of assumptions here, anyway.
Maybe he doesn't actually know or care if Spock is responsible and is just busting his chops, as friends often do? I've told friends "What'd you do?" when they were in the doghouse numerous times, because I know they can be oblivious when they're behaving like a dumbass sometimes. Their ethnicity had nothing to do with it.
Personally, I'm the kind of friend who knows when a joke is appropriate and when it's not. If my friend's significant other JUST broke up with them and it's plausible they feel like shit, the least thing I'd do is making fun of them or be like 'it's totally your fault! Sucks to be you'
Or maybe Bones, having experienced a breakup of a long term relationship himself, recognizes the mistakes he made in Spock's prior handling of his relationship with Uhura?
You are creating a subplot for s/u and Spock that we didn't even see (for all we know, maybe they are a lovely quiet couple that rarely argues and Spock is a decent dude who treats her well etc) to justify Bones. Why can't the explanation be more simple and just about how HE is in that scene, the actual thing we saw and we are judging, rather than speculate about how Spock possibly acts off screen?
Mistakes Spock made? Like really, we only have what happened in stid (when he possibly had PTSD) and Kirk was the one who knew, anyway.
Eta: could the fact Bones has a divorce in his past mean that maybe he is projecting HIS own mistakes onto others?
In that case, still, his scene says more about HIM than Spock.
Paragraph breaks are your friend.
Idk, I just wanted to try something different.. :P