Why did Jesus stay only inside the borders of Palestine instead of going to Gentile lands?
Jesus remained within the borders of Palestine and Israel because His mission was to fulfill the Abrahamic promises and covenant. The word was sent to the children of Israel first, and the record describes His works in the land of the Jews and Jerusalem, omitting Gentile regions.
Les explains that Peter came to Cornelius with trepidations and said God is no respecter of persons; in every nation, one who fears Him and works righteousness is accepted with Him. Yet the word was still sent to the children of Israel first, preaching peace by Jesus Christ, who is Lord of all. Peter testified that Jesus was anointed with the Holy Spirit and power, went about doing good, and healed all oppressed of the devil, because God was with Him. Les points out that Peter's witness covered what Jesus did in the land of the Jews and Jerusalem and left out any Gentile mention. Jesus did not go to Egypt, Syria, Babylon, or Africa. He stayed within the borders of Palestine/Israel because He came to fulfill the Abrahamic promises and covenant.