Don't make sweeping generalizations about anyone.

When we face a negative experience from a person, we use that one incident to generalize his entire character. We forget all the positive qualities he has. His one negative quality overshadows his every other positive quality. We even discuss with people about the person's moral flaws to defame him. The Prophet ﷺ said that whoever conceals someone's faults, Allah will conceal his faults on the Day of Judgment. So, don't make sweeping generalizations about anyone. Be very cautious of revealing someone's shortcomings. We all are prone to error. Do we want God Almighty to expose our sins before people, or to forgive us for our misdeeds?