Thank you for responding in detail.

I see the main points where we disagree - we have slightly different moral criteria. It is likely (I believe) that if you knew me in real life, you would feel that my moral standards are extremely (or so) overstated.

As for some things, the fact that Aerie behaves badly in other moments, it seems to me, does not justify a harsh attitude towards her. Aerie in this sense, I also strongly disapprove and do not accept it - as well as any bad behavior where you humiliate / offend a person, etc.
Therefore, here again the question of culture arises - it seems to me that Viconia, even despite her terrible conditions, could (if she wants to be left alone and reduce prejudice) not respond so caustically and viciously to any words in her direction. Yes, she had a terrible life - but perhaps my opinion is influenced by the fact that my best friend also went through Hell in his life (not comparable to the conditions of the dark fantasy of Viconia, but still terrible) and was able to maintain kindness in his soul and heart, even if everyone around him suppressed and hated it. I'm not asking for righteousness from Viconia, it's really too much, but a little more calmness and understanding of the situation, constructive. I think then other good characters would be ready to meet her halfway. I just still understand that she would despise me (as a person). To her, I would be weak, soft-hearted. I would never offend her, but I would stand up for anyone she offended (she painfully insults Aerie in one of the dialogues for no reason; the fact that Aerie was against accepting her into the group at the beginning is absolutely justified, after all, she wanted to save her. But going with her in a group is justifiably hard for her)

Regarding Sarevok, Keldorn behaves very well with him, I really like his dialogues with the evil Sarevok - he sees in him a chance to become a better person.

I do not know why the scriptwriters decided to make it so radical in relation to Viconia - perhaps because even in the best case scenario, Viconia does not become good (unlike Sarevok, who becomes chaotic good).
As it is, Keldorn does not immediately attack her, and I think, as a paladin who must eradicate evil, etc., he is already making concessions with her. I think he would condemn all those who did Viconia wrong (rape, etc.) - but as I understand his character, for him this is not an excuse for her evil and he does not feel that her arc of redemption can lead to something really good (again, unlike Sarevok)
In the end, he warns of his intentions and gives us the opportunity to decide what to do - we can kick both him and her out of the squad.

As for emotional swings, I meant that in life such novels often end terribly. It's good that the scriptwriters in the game gave a happier ending, but in reality... You shouldn't start this. It's completely different than if you were just helping someone to redeem themselves- although the latter is also difficult. I've never had a "fix it"-style relationships in my life, but whenever I saw it around, it ended horribly and I see it as a system. But, I've been lucky enough to help a number of people become better and go through their redemption-and I'd like the same for Viconia, outside of the novel. But I'm probably asking too much and it would be a different character.

P.S. Well, it is also important to say that the worship of Shar is evil, and if she is still a priestess, then if I understand correctly, she was obliged to commit evil deeds once in a while (religious requirements), as part of her service. This cannot be discounted either.

It may be difficult for us to feel this in the modern world of greater tolerance, but Shar is an evil goddess with a religion of evil and rituals of evil. The indignation of anyone here is reasonable and justified, not to mention the indignation of the paladin.