Evil

Since we have been talking about evil so much in class, it makes me think that if God is so "great" then why does he create killers, rapers, and child molesters? i understand that we build our character from making mistakes, and creating evil. But, do killers, rapers and child molesters really build a good character from what they love to do? I don't think so. I just dont understand why God would create such evil in the world. Phillips says that with all good comes an evil, but why does the eveil have to be so harsh? Its understandable that everyone makes mistakes or "creates" evil but being a killer is taking the "making mistakes" to an extreme. The world would actually be an enjoyable place if there was no evil but we know that wont happen anytime soon. There will always be sins, and evil