People make themselves feel better about themselves by putting others down. Like the Pharisee in the Bible who said something like "I'm not like that Publican over there." He felt he was better than others--just as so many do today. "I don't do the things he does; I'm a good person." Not in the eyes of God since he says that all our rightousnesses are as filthy rags in Isa. 64:6. We have no righteousness pleasing to God without His Son.