“Sir,” the woman said, “I can see that you are a prophet. 20 Our ancestors worshiped on this mountain, but you Jews claim that the place where we must worship is in Jerusalem.”
21 “Woman,” Jesus replied, “believe me, a time is coming when you will worship the Father neither on this mountain nor in Jerusalem. 22 You Samaritans worship what you do not know; we worship what we do know, for salvation is from the Jews.23 Yet a time is coming and has now come when the true worshipers will worship the Father in the Spirit and in truth, for they are the kind of worshipers the Father seeks. 24 God is spirit, and his worshipers must worship in the Spirit and in truth.” (John 4:20-24)
God has decreed that salvation would come through His chosen people, the Jews. In Old Testament times He demanded that those who seek Him must recognize Him as the God of Israel, whose temple was in Jerusalem. The Samaritans chose to disregard God’s commands and added their own traditions to Judaism (II Kings 17:29-33). Jesus cannot condone this action by the Samaritans, even though it is no longer necessary to worship God in Jerusalem. Therefore he points out the woman’s error so that she can repent of it. He does not ignore it, because it is wrong.