Among the teachings of Jesus Christ while here in on earth is that we should not judge so that we wwill not be judged. But the same Christ rebuked the Pharisees openly for their hypocricy (Matthew 23:1-39). He warned His disciples concerning false prophets (Matthew 7:15-23) and so on. Did Christ then contradict Himself by 'judging' others? What the Lord actually preached against is the hypocrisy of judging or condemning other sinners when the judge is a sinner himself and does not want to repent of his own sins (Matthew 7:1-5). It is also wrong to be too quick to condemn without knowing all the facts. Apart from that, we are to tell people their sins or faults in a loving manner and give them chance to right their wrongs. We should not condemn people outrightly because they can still repent and be useful to God and His Kingdom. Having said that, we should call sin by its real name. We should tell people their sins and the danger inherent with a view to turning them to Christ. That is certaunly not the judgement that Christ preached against (Isaiah 5:20, Micah 3:8, Ezekiel 3:18-21).