That's because you are meant to care for the Tieflings and the writer sort of forgot to communicate that to the people in charge of the goblin story. There is even a goblin child "mourning" the loss of its parents that says they must have been weaklings if they died to REALLY hammer home to suffer not the greenskin.
Then they failed, because the first time I went to free Haslin, my reaction was "WTF! I just killed children".
I don't think they failed, those are innocent casualties of war and bad education and control by grown ups. Those kids shoudn't be allowed to be there stoning a powerful Druid, also the fact that they die allows the player (if inclined to) to simpathize with the Goblins (the Camp was hard to me. In the Blighted village goblins acted like you expect from goblins that is in a cruel and almost feral way, the tied gnome was exemplar, what the goblins planned was waful, by mistake I switch of the brake of the mill and well I got that gnomes can no lear to fly, but in the Camp you had the, twisted, appreciation for Volo, or the goblin reading the diaries of Halsin, and the kids all make clear they hated the other species because they were the killers of their parents. I know probably the parents were raiding or pillaging but what the kids saw was that other species killed their parents).
I was so impressed that decided to try not to do a massacre. I failed because didn't find a way to stealthy kill one of the leaders that is he called for help and in the end when I got back to the camp to explore and loot I was attacked.
