Here's the point-by-point:
newtype_alpha said:
-Why did Spock go to the Romulans instead of the Federation?
What? Spock
represented the Federation on his mission to save Romulus.
Therein lies the problem. "Sophisticated space mission to save your planet from a natural disaster" is not generally one of the duties commonly entrusted to an ambassador. That is, in fact, one of the primary duties of STARFLEET, is it not?
For some reason, Starfleet couldn't be bothered with it, and Spock evidently volunteered for the mission on his own recognizance. He even used his considerable influence to procure a VULCAN ship, not a Starfleet one... in point of fact, would it not have been faster and more efficient to have simply arranged for a starship to support the mission instead of going all the way to Vulcan to modify a specially-designed vessel just for that one purpose?
We saw him in the Romulan senate
We saw him talking to a bunch of Romulans in an undisclosed location. We have no idea whether or not that conversation took place in the senate, or if the people involved were even senators. For all we know he cut a deal with his friends in the unification movement.
He was very probably the Federation ambassador to Romulus in 2387.
Probably not, considering Spock had already been an ambassador for decades by the time he inexplicably turned up on Romulus in 2369. We don't even know for sure that he's still ON Romulus twenty years later, or if he simply kept in touch with the unification movement after returning to the Federation to resume his ambassadorial duties.
Federation member Vulcan prepared his ship and the Red Matter. Why would you think the Federation weren't involved?
We know the Vulcans prepared the ship, we have no idea where he got the red matter. He obviously didn't get it from the Federation, since that sort of mission is usually handed out to ships with names like "Enterprise," not a hundred and fifty year old diplomat.
Moreover: Spock SPECIFICALLY promises to save Romulus from the supernova. This implies that the mission itself couldn't have taken place without Romulan cooperation (otherwise the promise makes no sense), in which case, the
Romulans probably gave him with the red matter he needed to make the mission work.
But if that's the case, why didn't the Romulans drop it into the supernova
themselves? They, too, have their own fleet and their own means of taking care of the supernova. At the end of the day, the mind-meld scene and plot logic alone provide no clues as to why SPOCK, of all people, is single handedly entrusted with the fate of Romulus. It must therefore depend on some factor that sets Spock apart, something he can do that both Starfleet and the Romulan empire are either unable or unwilling to do. The only thing that comes to mind is that Spock knows how to calculate trajectories for the slingshot-timewarp maneuver, and is in fact the only living person in the galaxy who is known to have done so.
-Why was he suprised that Romulus was destroyed?
Because he failed them.
That would be remorse, not surprise.
Only the Federation had the Red Matter. The Federation promised to save Romulus and didn't. Nero says this to Pike on the Narada.
Nero says that the Federation stood by and
did nothing.
Besides, it's highly doubtful the Federation provided the red matter since--again--there'd be no reason to promise the
Romulans anything at all. If Spock made that promise on behalf of the Federation then it was only his personal assurance; the fact that Starfleet apparently didn't get involved means the Federation really DID stand by and do nothing.