Three weeks ago, John Allen Chau was murdered after coming peacefully with gifts and the message of Jesus Christ to an isolated tribe on an island off India. It was his second attempt to reach the tribe. The day before, he had shouted to them from a distance, "My name is John, I love you and Jesus loves you," and offered fish. A tribesman about 10 years old shot an arrow at him, striking his Bible. Before he went ashore the following day, he wrote his parents, "You guys might think I'm crazy in all this, but I think it's worth it to declare Jesus to these people." Many people do think he's crazy. He took extreme steps to avoid bringing outside diseases, including quarantining himself for many days, but online comments sections are filled with people, not knowing that or deeming it insufficient, condemning him for exposing the island to disease. Many people – including some American Christians – don...