Can’t judge “at all”? Who says?
"Do you not know that we will judge angels? How much more the things of this life!" (1 Corinthians 6:3)
Only don’t judge if you can’t handle the same level of Judgment meted back to you as implied by Lord Jesus Christ in (Matthew 7:2)
Also, judge “righteously” if you do so – Lord Jesus in (John 7:24) Here are the latter two verses aforementioned:
"for in what judgment ye judge, ye shall be judged, and in what measure ye measure, it shall be measured to you." (Matthew 7:2)
"judge not according to appearance, but the righteous judgment judge.'" (John 7:24)