I therefore, the prisoner of the Lord, beseech you that ye walk worthy of the vocation wherewith ye are called, With all lowliness and meekness, with longsuffering, forbearing one another in love; Endeavouring to keep the unity of the Spirit in the bond
Ephesians 4:26-29. YES! We should be angry about certain things, injustice, abuse, etc. But do not let that anger lead to sin. Aka hate, anger about your OWN pride, or anything in you that causes you to be angry. Fight for what you believe and fight for truth.