Except Andrastians, as she declares herself above those who worship the Creators.
Condemning Briala moreso, however, is not. And condemning her at all is really just another example of her shortsightedness.
Short sightedness is kind of the cornerstone of Sera's character; she was built and promoted on the concept that she opposes decisions that harm the masses in pursuit of some vaguely defined greater good.
She's somewhat hypocritical in that regard when it comes to her own actions with the Red Jenny network, which you can call her on. But in regards to Briala, it's a perfectly fair criticism, given that the woman's plan was "prolong war and suffering, somehow elves will profit from this", with no real clear or defined idea of how to actually achieve that.
For what it's worth, I wouldn't call myself a fan of Sera's. I appreciate the view point she brings to the game, and find her humorous on occasion, but also find her annoying, and I detest how she actively wallows in her ignorance.
I just don't think "She opposes Briala" is adequate reason to denounce her.