Contradiction with Galatians 6:2
Encourages bearing one another's burdens, whereas Numbers 32:6 implies separating responsibilities.
Galatians 6:2: Bear ye one another's burdens, and so fulfil the law of Christ.
Contradiction with James 5:16
Calls for confessing faults to one another and being united in prayer, contrasting with the division implied in Numbers 32:6.
James 5:16: Confess [your] faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.
Contradiction with Romans 15:1
Urges the strong to help bear the infirmities of the weak, contradicting the separation suggested in Numbers 32:6.
Romans 15:1: We then that are strong ought to bear the infirmities of the weak, and not to please ourselves.