Quote Originally Posted by Sloanzilla View Post
"we are going to kill you, because you are a different species than us."
Are you talking about the rampaging trolls slaughtering villages, their allied kobolds waylaying travelers and helping them slaughter aforementioned villages or something else? Because I don't see how it's anything but Good to protect the innocent villagers from those terrors. I wouldn't ding a paladin for killing them all.

Of course, I wouldn't ding a paladin for choosing to spare them either. It's a slight limitation for the game that has to track alignment by numbers and assign those specific numbers to discreet options where a DM would be far better equipped to track a PC's motivations and such. Luckily there's a lot of leeway built into the system: You can take a Neutral Good action sometimes, and maintain your alignment with no problems.