Contradiction with Matthew 5:9
Exodus 39:7 describes a physical act of war, while Matthew 5:9 blesses peacemakers.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.
Contradiction with Romans 12:18
Exodus 39:7 involves confrontation, whereas Romans 12:18 advises living peaceably with all.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.
Contradiction with Luke 6:27
Exodus 39:7 describes defeating enemies, whereas Luke 6:27 instructs to love your enemies.
Luke 6:27: But I say unto you which hear, Love your enemies, do good to them which hate you,
Contradiction with James 3:17
Exodus 39:7 depicts a warlike endeavor, while James 3:17 highlights the importance of peace and gentleness.
James 3:17: But the wisdom that is from above is first pure, then peaceable, gentle, [and] easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy. [partiality: or, wrangling]
Contradiction with 1 Peter 3:11
Exodus 39:7 recounts an aggressive action, whereas 1 Peter 3:11 encourages seeking and pursuing peace.
1 Peter 3:11: Let him eschew evil, and do good; let him seek peace, and ensue it.