It is never good enough. Verse 15 may seem to support this attitude, but a comparison with Old Testament texts shows differently. We should get rid of obvious faults. And note that the emphasis is on our morality, not the morality of those around us. They have a pet cause or belief.
Crusaders express disagreement in unhealthy ways.
They seldom take the issue to those who can resolve it. At worst, some want retribution more than resolution. At best, they want everyone to respect them, even though they don't show much respect for others. I'm not the only one who feels this way. When pressed, they refuse to talk specifics.