A) Jesus himself in his earthly life said :Mathew 15:24 “I was sent only to the lost sheep of Israel.”This he said in his earthly life. while Mathew 28:16-20 is a vision which was said to be by 11 disciples after ascension of Jesus and it says some doubted. So if some doubts then whole document is suspicious. We should not forget the case of vision that Paul had who never even met Jesus yet is able to enter his contradictions in Gospel over and above the teachings of Jesus. So what Jesus himself said is preserved in Quran that he came for none but the children of Israel. while Prophet Muhammad came for whole mankind.
