Surah Al Imran: Family of Imran - Verses 59, 60 & 61 - Christianity vs. Islam 2 - Najran's Delegation

A Christian delegation from Najran –an area south of Medina in Arabia– came to visit Prophet Muhammad. They wanted to discuss some differences they had with the Muslims and the Jews. But they could not agree. So who is the best judge to solve these differences in Abrahamic religions?