I am the GM of Enterler's group and he and I discussed this after these posts. I definitely made some mistakes in my handling of this, but it also helped two other party members realize that how they were playing their characters wasn't in line with their alignments either.
I was trying to use this as an opportunity to start a discussion on relative morality - just because you don't agree with how the goblins treat their children, doesn't mean that all goblins need to die.
We are going to have the dwarf cleric of Torag bring this up in game next session and tell the other characters, "I'm not sure how we handled things with the goblin mothers and children was right, and here's why... According to my experience... As a Cleric of Torag...
I wasn't trying to force an alignment change, as I don't believe GM's should force that, players should see that their actions don't mesh with their alignments and do what the other guys did, "I think I need to be CN now". I don't think the cleric needs an alignment change, the party just needs to understand his position. I felt that I was going with the discussion at the table. Several party members were trying to argue the dwarf cleric out of his position, but as a character, it was clear he felt strongly that the goblins needed to die.
I wasn't as familiar with the character background as I needed to be and now that he's explained it to me, I understand his motivations. The interesting thing is usually the cleric is one of the least "murder hobo" of the bunch, but the tables turned. I regret using the sociopath label. All's well that ends well and this should lead to some lively discussion next time around.