1 Corinthians 6:6-8 but a brother with brother is judged, and this by unbelievers?

Diaglott⁽ⁱ⁾ ⁶ but a brother with brother is judged, and this by unbelievers? ⁷ Already indeed then certainly a fault to you it is, that law-suits you have with yourselves. Why not rather suffer injustice? why not rather be defrauded? ⁸ But you injure, and defraud, and these things brethren.