297. Is it OK to call someone a fool?

Yes, It's OK to call someone a fool.

Yes, if they are atheists.
The fool hath said in his heart, There is no God. Psalm 14:1, 53:1
Or if they trust their own hearts.
He that trusteth in his own heart is a fool. Proverbs 28:26
Jesus often called people fools. (So it must be OK.)
Ye fools and blind. Matthew 23:17, 19

Ye fools. Luke 11:40

O fools, and slow of heart to believe. Luke 24:25

And so did Paul.
Their foolish heart was darkened. Romans 1:21-22

Thou fool. 1 Corinthians 15:36

O foolish Galatians. Galatians 3:1

It's not OK to call someone a fool.

You're in danger of going to hell if you do.
Whosoever shall say, Thou fool, shall be in danger of hell fire. Matthew 5:22

Christian Responses
Apologetics Press
Annotated Skeptic's Annotated Bible
Answers in Genesis
Words of Truth
Grace to You

See also:
Is dancing a sin?
Is magic OK?
Is it wrong to steal?
Is it wrong to lie?
Is it OK to make images?
Is it wrong to have sex outside of marriage?
Is divorce ever permissible?
Is it OK for a divorced woman to remarry?
Is polygamy OK?
Is it OK to covet?
Should we hate other people?
To kill or not to kill.
To judge or not to judge.
Is it OK for men to have long hair?
How should nonbelievers be treated?
How should homosexuals be treated?
Should we let others see our good works?