The Abidan are the ruling polity in the...multiverse is, I guess, the best term. They're fairly angelically themed and a relatively benevolent organization, but very much in a 'we predict the future and do what is necessary to ensure optimal outcomes' kind of way. Very 'greatest good for the greatest number' kinda stuff and potentially pretty dogmatic about it. This can absolutely involve destroying entire worlds and, if necessary, everyone on them. Some of them are also colossal assholes, because they are a group of people, and that's how groups of people are.
The Vorshir, meanwhile are much less unified. They're basically a coalition of everyone willing to actually oppose the Abidan militarily. There are definitely idealists in their ranks who want to make a better, freer, multiverse but there are also greedy criminals out for themselves and people who just want to commit mass murder of entire universes for the lolz. They fairly routinely destroy whole worlds in their crusade to overthrow the Abidan.
So...yeah, Etaja's story about their home world is likely entirely true. The Abidan did analysis and were like 'well, more people die if we try and ave it, so we can't do that'...the Vorshir got a new recruit out of helping if they did it, and didn't care about that fact.