NWN: The Moral Dilemma

With bits and pieces of free time in between work I've been playing through the single player campaign of Neverwinter Nights and have just completed one of my favourite quests.

It starts when you, the hero, stumble across the ghost town of Charwood whilst seeking out a cult responsible for the plague that serves as the game's main plot. Charwood you soon find out is trapped in an eternal night and any residents who are killed immediately reappear as though nothing had happened. Talking to the townsfolk you discover that the town is protected by the brothers Jhareg, or at least was until one of the brothers committed a crime so heinous that Lathander (the God of Morning) sealed the town off in a state of eternal limbo.
Venturing into Castle Jhareg to seek out more information is the next step and in doing so you come across a spirit acting as guardian. The spirit sheds more light on the story, explaining that one brother, Quint, was a cleric of Lathander which is why the Morning God felt he was too biased to judge the brothers for the atrocity committed and sealed off the village to await the arrival of an impartial hero such as yourself. The spirit explains that the crime committed was the death of every child in the town.

The goal of the quest is to find both brothers, Quint and Karlat and find out exactly what happened to allow you to judge which one is at fault. It soon becomes apparent that Karlat played a big role in these events. He sought a form of undeath, to become a Baelnorn. A Baelnorn is an everliving protector and achieving such status would have allowed Karlat to watch over Charwood forever. To achieve this Karlat summoned the Demon Lord Belial who told him that the ritual would require the sacrifice of innocents and that he would need to kill all the town's children, at which point he and the children would be resurrected unharmed. To this end, Karlat tricked his brother Quint into luring the children to the castle.
Summoning Belial for his side of events adds more to the story. It seems Belial lied and was, true to his nature, simply sowing the seeds of evil and chaos. This he admits openly, being a demon this is his raison d'etre and he points out that he should never be expected to act contrary to that.
Finally Quint reveals his side of the story, explaining that he invited the children to the castle on the orders of his brother for a 'party', something he found odd knowing full well that his brother had a dislike of children and hated having them around the castle. Worse still, he was coerced into helping Karlat kill the children and was also responsible for interrupting the ritual, causing Lathander to intervene.

Sounds complicated? Ultimately the goal of the quest is to assign blame so that the town may be released. It seems most players have differing attitudes on who was truly to blame and so I ask your opinion...

Was Belial to blame? After all, it was his lies that kickstarted these events. Without his deceit Karlat would have never thought to sacrifice the children of Charwood. Or is he simply acting as a demon is expected to act, being inherently chaotic and evil?

Was Karlat to blame? Were he not so eager to cheat death, were he not so eager to enlist the help of a demon, were he not so trustworthy as to think the demon's words correct, would things have been different? Did his tricking of Quint leave him at fault? Or was Karlat acting in good faith? Was he simply trying to ensure eternal protection for his people by acting out a ritual that, to his knowledge, would ultimately end without any real sacrifice?

Was Quint to blame? As a cleric of Lathander and protector of the town should he not have prevented his brother from consorting with demons? Should he not have been suspicious of his brother's sudden generous invitation? Should he not have been so blind to his brother's plans? Is it not his duty to report such things to Lathander? Or is he guilty of nothing more than being gullible, than trusting his brother without question knowing in his heart that Karlat always has Charwood's best interests at heart?

It's a tricky one for sure. A real head scratcher and there is no right or wrong answer. Blame can be given to any one of the three (but not all three). Give me your musings and I'll explain who I assign blame to in a couple of days. :P