After Macbeth killed Duncan he basically asked for horrible things to happen to him. There were, strong winds, strange screams, earthquakes, and several other thing. Macbeth actually kind of went crazy after everything and even lost his wife. For everything he has always wanted which was to just be loyalty, he lost his loved one out of it. If we wouldn't have killed him then they would of been fine, his wife would of been alive and there would be no problems. Just their usual lives.