In order to interprete what Jesus' teaching is targeting to , one need to separate himself from what people say that the " scripture "says. Taking Matt. 7:1.2; Luke 6:37: even John 8:15 , as a base for this discussion, we have to consider and understand the context, as in most of the instances, since Jesus' teaching wasn't spoken in chapter and verse which in reality recorded in original Greek text is recorded each " book " ( gospels ) as one single long uninterrupted sentence all the same capital letters. Earlier aded verses mean not to be critical of other people or they will be critical of you; pointing to mental " judging" or an opinion. Assuming that Jesus of Nazareth knew the common " problem" of the day, is giving a practical advise : do mind your own business . . . ( keep out of trouble ).
Bringing to our reality : average human inter- relationship occurance " Christians " not exempt ( is this judging now? God the Holy Spirit knows those living righteously by faith , Rom . 1 -:17) or rest of those who are pursuing the business of the Kingdom of God " among you..."
In my inner ears rings a message said by the Messiah ," leve him ( your neighbor ) alone, look at yourself and consider your Christianity how much better you are according to the requirement to those who follow Jesus , the Messiah.