The day is coming soon when God will punish those who break His laws and reject His Word. When Christ returns to stand upon the Mount of Olives, He will begin settling accounts (Matthew 25:19), bringing with Him both punishment and reward (Isaiah 61:2-3; Matthew 25:31-46).
Christ did not come to judge the world when He was born, lived, and died as a human 2,000 years ago. "He who was ordained by God to be Judge of the living and the dead" (Acts 10:42) "will judge the living and the dead at His appearing and His kingdom" (II Timothy 4:1). When confronted by the scribes and Pharisees with the woman caught in adultery, Jesus does not condemn her, but instead tells her to "sin no more" (John 8:1-11). His time as Judge of all had not yet come.
Later, He plainly tells the Pharisees, "I judge no one" (verse 15). Though they were guilty of hypocrisy and many other sins—which He severely castigated them for—He does not judge the Pharisees either. He made no move to stop them from continuing in their evil ways.
The Pharisees completely misunderstood His mission. They did not interpret the prophecies in Isaiah 61:1-3 and Malachi 3:1 to mean that Messiah must make two appearances on earth—at two different times, for two different reasons. When Jesus came the first time 2,000 years ago, He made it very clear that He would come again (Matthew 16:27; Luke 21:27; John 14:3).
In His first appearance, He came to deliver a message from His Father, the good news of the coming Kingdom of God on this earth (Mark 1:14-15). He also came as a Lamb to be sacrificed for our sins and make eternal life possible for us (I Peter 2:21-24). During this appearance, He refrained from judging the world before its time. At His second coming in power and glory as King of kings, one of His major responsibilities will be to judge the world and take vengeance.