IntroMercy in the case is showing compassion toward people trying to harm you or take something from you. If they want you to stop your actions that are preventing them from accomplishing their goal, then they need only stop their actions, then you may show them mercy. However, if your mercy will only allow them to achieve their goal or allow them to continue their actions against you, then they deserve no mercy.
The following is an example of showing no mercy.
The motherIn 1984, Ann Maria Rousey became the first American woman to win a World Judo Championship in judo. She used to come up behind someone she was about to fight in a tournament, kick her in the leg, and say, "Yo, I'm gonna kill you!" During the 1984 World Judo Championship season, most of her matches were won using a submission arm lock; she dislocated the arms of six opponents. She showed no mercy.
The daughterIn 2004, Ann's daughter, Ronda Rousey, then a 17-year-old U.S. champion in judo at 139 pounds was expected to become the first U.S. judo competitor, man or woman, to win an Olympic gold medal, possibly at the 2004 Olympics in Athens. Like her mother, she was an expert in using the arm lock. Most of her wins were by arm locks, she had injured over five arms in the first six months of 2004.
In August 2003, Ronda had faced 22-year-old Telitha Ellis. When she got Ellis in an armbar, Ellis tapped (surrendered) but the referee did not see it, so Rousey kept cranking the arm until it popped. Rousey was widely criticized for not showing any mercy.
In May 2004 at the U.S. Senior National Judo Championships, Rousey faced a healed Ellis again. She got Ellis in an armbar again. Ellis tapped but the referee did not see it even when the people around the mat saw it and screamed at the referee. When the referee still did nothing, Rousey let Ellis out of the hold. Rousey later won the match with a throw, but she was still reprimanded by her mom and other advisers for taking pity on a competitor by letting her out of a submission arm lock before the referee ended the match.
Afterward, Rousey said that from then on she would ignore criticism for her actions and show no mercy to opponents. She said. "The other girls know it's a part of the sport, so they should live with it. I'm taking the same risks they are." Rousey went on to become a professional MMA fighter and UFC champion who won most of her fights with an armbar, usually in the first round.
No mercyMercy should be reserved for those who are NOT trying to harm you, take something from you that belongs to you, or keep you from attaining something that you have a right to. When someone is doing one of these to you, they should stop their actions; if not, then you should show no mercy in your actions to make them stop. If they want mercy, then all they need do is stop their actions against you—you should not stop your actions.