This is not an extra point, as if judging is bad, but hypocritical judgment is worse: hypocritical judgment is of the essence of what Christ is forbidding. The fault is not applying the standard uniformly; the hypocrite applies it in one way to others but in another way to himself.
The faculty of judgment is damaged in us when we act in this way so that we are not able to rightly get matters in proportion. What is really very small and insignificant becomes disproportionately large in our eyes. We become hyper-critical and incapable of tolerating anything that does not conform to our prejudices. We must not treat all faults in the same way but have a scale in our minds. We must be ready to make allowances for ignorance and inexperience. We must see the difference between those who want to do what is right, but fail through ignorance or immaturity, and others who with subtlety and deceit attempt to pervert God’s law. We must be able to put the best construction on another’s motives and hope all things if they have the grace of God within them.