One would think that Druids, who stand for balance and already live door to door with the local bloodthirsty Goblin tribe, should be more than capable of recognizing Goblins of other tribes, behaviors or outcasts, differentiating in their favor, and this despite Kagha's paranoia. Not all Druids are on the same page as her. Zevlor and the other Tieflings are themselves driven exiles / refugees and should not fall into the same role as their skeptics. Exceptions, like Arka, prove the rule and can be used as a chance for very exciting interactions and solutions from Larian. Let the happy rp begin!
This is another point of consideration as far as how the lore treats goblins. We literally have the archdruid of the Grove tell us that he does not want to completely wipe out the goblin camp and that we should try to take out the leadership, as they are the real problem stirring the tribe to the extent they've reached. He only fights all the goblins because his bear-fury cannot be fully tempered.
So right off the bat the druids don't consider the goblins something to be exterminated on sight. I have a hard time seeing Zevlor wanting to kill all the goblins too, seeing as his people took a goblin prisoner and Arka was being talked down by her companion before we show up. The tieflings just want to get to Baldur's Gate. They don't care how you make it possible.
This overwhelming goblin bloodlust just doesn't seem to exist within the narrative. We're not killing the goblins because they are goblins. We're told repeatedly that we're killing them because they are hostile and need to be dealt with.
Heck, if you go to the Forgotten Realms wiki you can find this paragraph:
Despite their generally poor reputation however, not all goblins were dim-witted or evil. Some goblins have risen to become heroes, gaining enough renown to be accepted into the civilized world of other, more commonly good races. Those goblins seeking this path may have found it difficult to overcome their temper and greed, as well as the cultural influence of their brethren, but those who did often found it could be more rewarding, in the long run at least, to serve good rather than to serve evil.[14] Those that did often made use of their ill-gained talents as rogues or fighters.[7]
The fact goblins are a playable race on the tabletop, which uses Forgotten Realms as a default setting for the most part, should be a clear indicator that goblins can be heroes within Forgotten Realms, which in turn means there's no lore reason to completely prohibit them from being playable. Certainly, they aren't less reviled than the frickin' Drow and Githyanki we can already play.
