You’re right, the Bible does not teach us to refrain from judgment of behavior. Scripture actually tells us to make a righteous judgment. Peter called Ananias and Saphira liars; Paul called the Galatians fools.
The Bible lays out a standard for us to live by. We have to be able to judge between right and wrong...how else can we be truthful and accurate about the Bible’s message?
When you hear someone say, “Oh, you can’t judge!”, it usually tends to be someone who is more of a moral relativist instead of someone who stands by the Bible’s firm moral absolutes.
Those folks often try to use Jesus’s words in Matthew 7 to prove their point:
“Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye? How can you say to your brother, ‘Let me take the speck out of your eye,’ when all the time there is a plank in your own eye? You hypocrite, first take the plank out of your own eye, and then you will see clearly to remove the speck from your brother’s eye.” (Matthew 7:3-5)
When you read it, you see that He is telling us HOW to judge, not that we should refrain from judging...”and then you will see clearly to remove the speck from your brother’s eye.” In other words, don’t judge a behavior if you’re doing the same thing yourself.
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