I just have to say, that attitude bothers me. It's OK if the Zuma destroy Terran because of something that you personally were involved in, but not if it's because of something that someone else did.
What about all the people in Terran that had nothing to do with the Triunist shrines in Zumaland? Like the Astroist players. Are they supposed to be OK with it because it was a Terran that ordered the shrines built? It may not even have been a Terran priest that built the shrines. It's not like you can tell it was a Terran. Would it be OK for the Zuma to see the Triunist shrines, see a Triunist temple in Asylon, and go destroy Asylon? I don't think the Asylonian players would like that, nor agree that it was good GMing. Or if they asked Allison, who apparently is now trusted by the Zuma
(and holy crap, talk about a huge potential for serious mayhem: Allison giving guidance to the Zuma!!
), and Allison says "The D'Harans are the ones who follow Triunism", and the Zuma go off and destroy D'Hara, what are the D'Harans supposed to do? Are they supposed to be OK with that?