It takes a person with true humility and acceptance to admit that they are evil. Humans are born evil, plain and simple. You don't just tell them "that they are rotten and evil inside," you tell them that you love them and care about them enough that you want them to see the error of their ways, repent of their sins, come to Christ, and receive the gift of eternal salvation. That's what a true Christian would do, but you wouldn't know what a true Christian is, would you?