Contradiction with Matthew 5:39
Ezekiel 38:7 speaks of preparation for battle, whereas Matthew 5:39 encourages turning the other cheek instead of resisting evil with violence.
Matthew 5:39: But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also.
Contradiction with Romans 12:18
Ezekiel 38:7 involves militaristic preparedness, while Romans 12:18 advocates living peaceably with all men rather than preparing for conflict.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.