Contradiction with Matthew 5:44
Zechariah 9:13 speaks of combat and conflict, whereas Matthew 5:44 teaches to love enemies and bless those who curse you.
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 Romans 12:18
Zechariah 9:13 implies a call to conflict, but Romans 12:18 emphasizes living peaceably with all men.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.
Contradiction with Matthew 26:52
Zechariah 9:13 depicts arming for battle, while Matthew 26:52 advises to put away the sword, promoting peace over violence.
Matthew 26:52: Thinkest thou that I cannot now pray to my Father, and he shall presently give me more than twelve legions of angels?
Contradiction with James 1:20
Zechariah 9:13 suggests divine wrath utilized in conflict, whereas James 1:20 says the wrath of man does not produce righteousness.
James 1:20: For the wrath of man worketh not the righteousness of God.