Things are not always what they seem.

If we judge character by appearance or outward behaviour, we could be so wrong.

Not all people who live upright and moral lives do so because they are exceptionally pure and holy on the inside.  Some character flaws can help us avoid evil.  Pride keeps us from stealing; timidity keeps us from promiscuity; fear keeps us from killing, etc.

On the other hand, people who do apparently bad deeds may have righteous inner cores that surprise even themselves.  There are stories of gangster bosses who live the life of crime to keep their underlings employed; they are misled leaders who love to provide.  Many disgruntled idealists have become members of totalitarian regimes over the years; they are pursuing justice--just down the wrong path.  Even some sexual offenders purposely re-offend to get themselves back into jail and out of harms way.

God forbids that we judge and He has good reasons for it.  1 Samuel 16:7b says that the Lord looks at the heart.