The targets of this story are not wayward sinners but religious people who do everything the Bible requires. Jesus is pleading not so much with immoral outsiders as with moral insiders. H wants to show them their blindness, narrowness, and self righteousness, and how these things are destroying both their own souls and the lives of the people around them.
Timothy KellerGod's Kingdom is "present in its beginnings, but still future in its fullness. This guards us from an under-realized eschatology (expecting no change now) and an over-realized eschatology (expecting all change now). In this stage, we embrace the reality that while we're not yet what we will be, we're also no longer what we used to be.
Timothy Keller