Some advice if you please. I'm in a campaign and playing a LG monk. My monk would have a code of honour to stand by and this has on a number of occasions been at odds with the rest of the party. I believe we are at a cross roads given recent events. I don't think I am being lawful stupid. I believe my compromises were reasonable. And most importantly I don't want to derail the campaign over this.
Incident 1) the party snuck up on a bunch of sleeping enemies and killed them in their sleep ... including the paladin. I felt this was dishonourable so I didn't take part in it and instead ended up fighting the bbeg who was not sleeping and rushed into the room at the sound of battle. I thought this was a fair compromise and didn't hamper the party's chance at success. The party thought otherwise because I gave up my surprise round attack. I was soundly berated after the fight because of it. Afterwards we discussed my code and slaying people in their sleep ... even though they were evil ... wasn't something I was prepared to do. I kind of figured it was water under the bridge.
Incident 2) A few sessions later we found ourselves rushing into a room full of evil cultists. We had surprise on them. This in and of itself my monk figured was fine. They weren't sleeping; just surprised. I quickly discovered that the cultists were incapable of defending themselves and the fight was going to be a slaughter. They had no weapons and no armour and no training. Essentially they were peasants. Rather than slay the weak, I chose to subdue them with non-lethal damage. The rest of the party simply chopped their cultists to bits. This in and of itself was problematic but I felt again that I had compromised well. But what happened next is where the real problem is. Just to spite the monk, our party rogue snuck in and killed those unconscious cultists when I rushed to the other side of the room to deal with some other creatures who joined the fight.
So the question is, how should I deal with this? I tried educating the party but that hasn't worked. I don't want to derail the campaign by meting out punishment on my own party members. I don't particularly want to leave the party and start a new character. But when I'm trying to work with the rest of them and find a compromise, some of them are clearly not interested and sabotaging my attempts.