Alda's "peaceful faction" is a joke; they're only interested in the rights of (some of) Vida's races as far as they don't upset the status quo and inconvenience 'real' people. They're less Martin Luther, and more Martin Luther King's white moderates. Hartner Duchy going unpunished after they betrayed and murdered their allies from Talosheim? Shouldn't do anything about that, think about all the 'chaos' it would cause! Freeing the falsely imprisoned Titan survivors enslaved in the mines? Don't do that, think what that would do to the economy! Sauron Duchy isolating the Scylla and then murdering them in a false flag to draw them into their war with the Empire? Just gotta let them do it, think about how much punishing Sauron's shitass leaders would hurt the war effort!
All Talosheim thing happen 200 years ago, and almost no one outside of Hartner Duchy knew a thing about it. And it never gets public before one of reincarnators was born in Hartner family. All thing with Scylla happend after Sauron Duchy was conquered by Amid Empire and by some partisans, who plotting to make their army bigger, and lately was killed. All thing still a mystery to Orbaume kingdom even now. Actually, I don't even see you point with both, as it unrelated to religion and never going public.
And about other Vida races I alredy told. They are considering monsters. If you learn history, you would knew, that perspective of people changed slowly. Like just 100 years ago women don't have rights. And it's weird that someone like Heinz, who started to change this situation, hated for it, because he doing not fast enough.
And, well, imagine for are moment, that you are
normal adventurer and meet Empusa in the forest. I really doubt you would try to talk with it, not run or kill. Only Shneider built different and would try to fuck this giant mantis-human hybrid.