It wasn't a fight against terrorism, it was a shooting war between rival factions for control of an empire.
The Romulans turned away because they were exposed and the Federation fleet would have been within its rights to attack them under the circumstances. And their exposure would have caused the Duras faction to lose support.
And it seems like you're the one who's sloganeering. This seems like some kind of crusade on your part. I'm back to wondering what show you're watching.