The scriptures caution us about judging others.  A person's assessment of another must be honest, thorough, and with their own selves in view.  Examine yourself before judging others is the watchword.  What is your motive in judging?  How does your own life measure up to the Word?  The incident in which the woman taken in adultery was brought before Jesus sheds a lot of light on this topic of judging.  His handling of this situation is beautiful.