“Be angry, and do not sin”
Example:
I am angry over the murder of infants in the womb (aka abortion), but you will not find me going from one murder chamber to another and blowing them to smitherines.
Indignation at dishonor done to God, and wrong to man, is justifiable anger. Should circumstances arise to call for anger on your part, let it be as Christ’s “anger” (Mark 3:5),without sin. - JFB
Righteous anger is commanded, not merely permitted.
The fear of the LORD is hatred of evil; Pride and arrogance and the way of evil, and perverted [deceitful] speech I hate. Proverbs 8:13
The virtue of all virtues is humility; therefore Wisdom hates, above all, self-exaltation in all its forms. - K&D