One person in the opposition makes some self-sacrificing act to save someone on the other side. The bond of hate is broken for a few more. They remember working together, and the sacrifice of one man, and consider what they are about to lose so they can continue hating each other. One by one individuals leave the quarrel until only the opposing leaders are left. When the two leaders begin to fight, putting them all at risk, the people return, take the two away, and throw them in prison.
People are tired of the hatred and killing in their community.
Two brothers stand at opposite extremes of the problem, but they are best of friends and love each other. One campaigns for peace and tries to bring people together. The other campaigns for never surrender until the enemy is gone. The warring brother starts a terror campaign that causes the murder of his brother. He realizes that he could have prevented his brother's death, so he is the cause of his murder.