“She is saying that the gospel of Jesus Christ says that evil will be defeated by overcoming evil with good.”
I agree, though I also believe we live in a fallen world. Your argument is the same as the Quakers and other pacifists who use Jesus as a justification for not responding appropriately to threats.
Actually, check a little further down. The state bears the sword, not individuals. The state dispenses justice, not mercy. We dispense mercy and forgiveness, not the state. Quakers and pacifists err in applying Jesus's command to individuals as though they were directed to people acting in offices of the state. If that were so, John the Baptist, when asked by soldiers what they should do, would have said to lay down their arms and leave the army. He did not. Again, that is a misapplied command, which carried out, would result in civil anarchy if the majority of the population were converted, as Christians would be commanded to leave all positions which use force to maintain justice. This is silly, especially in light of Romans 12.