Yeshua said, "Truly, I say to you, no prophet is acceptable in his hometown."
Luke 4:24

This is the logical response to the hypothetical objection proposed in the previous verse. "I didn't come here to minister to you, because you wouldn't have accepted me until I saved everyone else first."

This is the same thing that happened with Joseph. He told his brothers that they would serve him, and they reacted by selling him into slavery. In order to save them, he had to go to Egypt and save the Egyptians first. This is what has happened to Israel. In order to save Israel, Yeshua had to go to the world. In the end, it isn't the world that is saved, but those who have been saved out of the world and joined to Israel.