Judge not, that ye be not judged. (Matthew 7:1)
Do you know every circumstance of your neighbor's life, what makes them do the things they do? Are you even aware of all the things that make you do the things you do? God does. He knows every instance in your life that influences the way you behave today. He knows your innermost heart and soul.
If we barely know ourselves, how can we be in a place to pass judgement over our neighbors? Leave the judging to God, He knows the hearts and souls of all. He is the teacher, He has the understanding, the knowledge. Take your heart and those you mean to judge to God. Let Him be the judge, let Him be the teacher. He will fix all, He will judge based on what He knows not on what we don't know.