Contradiction with Proverbs 15:1
A gentle answer turns away wrath: Acts 7:54 shows the reaction of wrath instead of calmness.
Proverbs 15:1: A soft answer turneth away wrath: but grievous words stir up anger.
Contradiction with Matthew 5:44
Love your enemies: Acts 7:54 depicts hatred and animosity.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Proverbs 16:32
He that is slow to anger is better than the mighty: The people's quick anger in Acts 7:54 contradicts this.
Proverbs 16:32: [He that is] slow to anger [is] better than the mighty; and he that ruleth his spirit than he that taketh a city.
Contradiction with Romans 12:21
Be not overcome of evil, but overcome evil with good: The violent reaction in Acts 7:54 opposes this guidance.
Romans 12:21: Be not overcome of evil, but overcome evil with good.
Contradiction with James 1:19
Let every man be swift to hear, slow to speak, slow to wrath: Acts 7:54 illustrates the opposite behavior.
James 1:19: Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath: