The secret ballot is what I was suggesting as a way to test for consensus in this situation. What we do in the Green Party is say, “Okay, we've fought this thing out. People were in vicious and violent disagreement. Are we now at a point where we've heard each other enough that we have to compromise here?” Then we test for consensus. Do we have consensus, which is basically unanimous?
If we don't have consensus, then we ask people, “Would you stand aside to allow the consensus to be accepted?” Then generally speaking, when people realize that the hill they want to die on is occupied by only themselves, they'll generally say, “I will stand aside”, and this is accepted by consensus.