According to memory alpha the excelsior captain's name was spelled "styles" and the guy from balance of terror is "stiles"
That didn't stop the Reeves-Stevenses from treating the two characters as one and the same in the novel Prime Directive
. An interesting possibility with interesting possibilities - but the book went the way of displaying continuing and growing friction between Kirk and Stiles/Styles in the TOS era, in order to "excuse" the failure of Styles/Stiles to be Kirk's best friend and staunchest supporter in ST3. A bit unnecessary IMHO.
There would definitely be something very wrong about that.
I don't think you see the entire picture here. If Vulcans and Romulans are one people with one agenda (a gigantic
if, but a natural conclusion to jump to, in the circumstances), then what happens next must logically be that Spock tries to destroy the Enterprise
. If he fails, and Kirk manages to report back, Vulcans elsewhere, everywhere, will immediately attack the Federation. The green-blooded enemies have run out of options and out of time, and must proceed or perish. And considering that an attack was launched after a long silence, it must be assumed that the enemies are ready
to proceed on all fronts.
If, on the other hand, Spock is not in cahoots with the presently revealed villains, it might be simply because Spock is an outcast. Internment of those Vulcans responsible for the original conspiracy against the Federation, the one where the identity of the enemy was so cunningly hidden, is still prudent.
If the connection between the evil elves on the viewscreen and the Vulcanoids back home is as tenuous as the one between the evil human-lookalikes on Eminiar or Gideon and the humans back home, then there is no reason to act against Spock or Vulcans in any way. But can Stiles bet the future of mankind on that? He feels he is uniquely positioned to question the unquestionable thanks to his historical expertise; now, can he ramp up the courage to assault Spock and fulfil his duty as a Starfleet officer?