Contradiction with Proverbs 3:30
Nehemiah 13:7 involves Nehemiah confronting wrongdoers, while Proverbs 3:30 advises not to strive with others without cause.
Proverbs 3:30: Strive not with a man without cause, if he have done thee no harm.
Contradiction with Matthew 5:44
Nehemiah 13:7 describes a confrontation, whereas Matthew 5:44 encourages loving and blessing enemies.
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
Nehemiah 13:7 shows Nehemiah dealing with conflict, but 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 1 Corinthians 13:4
Nehemiah 13:7 includes conflict, while 1 Corinthians 13:4 speaks of love as patient and kind.
1 Corinthians 13:4: Charity suffereth long, [and] is kind; charity envieth not; charity vaunteth not itself, is not puffed up, [vaunteth...: or, is not rash]