My point is that Kagha and her followers are mad about something they could eaily solve themselves but have chosen to be xenophobic assholes for a reason the player does not understand. I doubt you are supposed to hate Kahga to the level where siding with her is just irrational, right?
This might be one of those situations where the only people who are supposed to side with her are the "purge all the unholy in the name of whatever" types to make them feel good about themselves.
The Tieflings are totally in the right and the druids totally in the wrong. There is no incentive IMO because there is no rational decision making behind not helping the refugees. The evil / goblin path notwithstanding as there you simply murder everyone in the grove for vague religious reasons.
I agree with you on the first sentence. What I meant about not helping the refugees was that at this point in the game you probably are thinking the tadpole is really urgent and getting it out is priority. If you stop to save anyone you potentially put them at risk. The Kagha situation may shock you into acting to help the refugees first even if is not the safest idea.