I do not kill companions just because I disagree with them about ethics (or anything else, really). It's their life to live, not mine (man, how often did I use that sentence in RL debates lately). If they did something I can't tolerate, I'd still prefer to go separate ways rather than kill them.

Having said that, if things turn out, by the way I navigate the plot, that we end up on opposite sides, then that's too bad. I'd like to come to know Minthara, but since I won't side with the goblins as a rule she'll likely end up dead almost every time.

Everyone else, I hope to keep alive.