As a Social Worker I was taught to have a non-judgmental attitude. Dr. Maureen Didier taught us to "take the client where they're at, not where you want them to be, not where you think they should be, you have to take them where they're at." Carl Rogers taught counseling psychologists that one of the therapeutic factors in a psychotherapeutic relationship is "unconditional positive regard."
Tonight, in my evening prayers I read in the Manual for Teachers in A Course In Miracles "God’s teachers do not judge. To judge is to be dishonest, for to judge is to assume a position you do not have. Judgment without self-deception is impossible.” M-4.III.1:1-4
Among the characteristics of a Teacher of God is tolerance and by tolerance is meant a non-judgmental attitude.