I love the following story. If we followed this example there would be much healing in the world. The best part is we don't have to wait. We can start today. I think even recent news guides us that one just never knows what pain is held inside someone.
There is an old story of a farmer who was proud of the fruits produced in his orchard. There was one diseased tree that never produced anything of value but merely took up space in the orchard. He tried everything, but couldn't get rid of that tree. He tried cutting it down, but it would grow again from a shoot. He tried poisoning it, but it never quite died. Then one day, following someone's advice, he planted many healthy trees around it. They were vigorous and healthy trees that suited the environment well. Soon it was difficult to see where that diseased tree was amongst them. Gradually those beneficial healthy trees took over the entire space and when the farmer looked for his old adversary, that diseased tree couldn't be found; it had become healthy and on its branches were growing crops of beautiful fruits.
(B.K.S. Iyengar, from Core of the Yoga Sutras)