Hardly a day goes by where I don't hear or see the phrase, "You're judging!" = so let's discuss the meaning of "judging" again.
"Judging" refers to the attempts to correct others according to your own standard of iniquity instead of Torah. When you do that, you condemn yourself. When you "judge", you must do it SOLELY by the standard of truth, and that truth (which Paul amply addressed in Romans 2:1-8) is Torah.
So, the bottom line is, when Torah observant Believers see someone teaching for instance, "there's no need for Yeshua," or "no need for Torah," or "It's okay to have an affair when you're married to an unloving spouse," or anything else that is contrary to Scripture, we MUST rebuke them!
To sit idly by and say nothing is NOT an option, for if we don't help our brethren stay on the YHWH's Path, then WE will be held accountable! (See Ezekiel 33, James 5:19, Matthew 18:6, Acts 20:28, etc.)
In Torah, we learn the following:
Leviticus 19: 15 "'Do not be unjust in judging - show neither partiality to the poor nor deference to the mighty, but with justice judge your neighbor. 16 "'Do not go around spreading slander among your people, but also don't stand idly by when your neighbor's life is at stake; I am ADONAI. 17 "'Do not hate your brother in your heart, but rebuke your neighbor frankly, so that you won't carry sin because of him. 18 Don't take vengeance on or bear a grudge against any of your people; rather, love your neighbor as yourself; I am ADONAI. (CJB)
So you see, Scripture commands us to warn our brethren about sinning, but the problem is many attempt to use New Testament scriptures, such as Romans 2 as proof that we are not to "judge one another." (Read Romans 2 in context)
TORAH is our judge, and if you see a brother or sister who has fallen head-long into sin, you can't just stand by and watch, or attempt to "pray it away." You MUST warn that person. But, simply telling someone they're breaking ELOHIM's rules is NOT "judging"!