Agreed. This is pretty stupid. I've been playing the good guy the whole game, I'm walking down the street and some fella asks me to help him, okay, no problem. So I end up having to kill him before he fries my ass. Then I see this evil altar thing which asks me to go murdering. So I tell that evil deadric asswipe to go screw himself ('never intended to help you, let me go' answer)...and I set off to free the priest which is the new entry on the quest objectives. So I free him, and he goes to challenge the evil deadric spirit. Okay, fair enough, I've chosen the good option and I'm gonna go help him. But hold on...the only possible thing I can do in the house is murder the fella. Now what's that all about? Why did I even have the option of rescuing him? It is...lame. Perhaps quests should come with application forms labelling them as good or evil...
"Molag Bal is the Daedric Prince whose sphere is the domination and enslavement of mortals. He is known as the King of [censored]. His main desire is to harvest the souls of mortals and to bring them within his sway by spreading seeds of strife and discord in the mortal realms."
What else would someone expect from him if not murder and blood? And if your character is a good-citizen the quest is
even more interesting because it's a moral dilemma, you
need to kill him to survive and get out of the house.