Judge Not
Do not judge, so that you may not be judged. For the judgment you give will be the judgment you get, and the measure you give will be the measure you get. Why do you see the speck in your neighbor's eye but do not notice the log in your own eye? Or how can you say to your neighbor, 'Let me take the speck out of your eye,' while the log is in your own eye? You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your neighbor's eye.
Matthew 7:1-5
From the Sermon on the Mount, complete with Jesus' most comic image: a man with a beam in his eye performing surgery on his brother's speck.
Jesus does not forbid discernment. He forbids the courtroom posture, condemning others by a standard we would fail. The measure you use will be used on you is one of his most repeated warnings, and the beam always belongs to the one doing the measuring.
When the urge to judge arrives today, redirect the entire investigation inward first. Deal with your beam with the energy you were about to spend on their speck.