The point is not that Jesus was a good guy who accepted everybody, and thus we should do the same (though that would be good). Rather, his teachings and behaviour reflect an alternative social vision. Jesus was not talking about how to be good and how to behave within the framework of a domination system. He was a critic of the domination system itself.
Marcus BorgPeople who think of God as a warrior may become warriors themselves, whether in a Christian crusade, a Muslim jihad, or an apocalyptically oriented militia. People who think of God as righteous are likely to emphasize righteousness themselves, just as those who think of God as compassionate are likely to emphasize compassion. People who think God is angry at the world are likely to be angry at the world themselves.
Marcus BorgChristianity's goal is not escape from this world. It loves this world and seeks to change it for the better.
Marcus BorgI would argue that the truth of Easter does not depend on whether there was an empty tomb, or whether anything happened to the body of Jesus. ... I do not see the Christian tradition as exclusively true, or the Bible as the unique and infallible revelation of God. ... It makes no historical sense to say, 'Jesus was killed for the sins of the world.' ... I am one of those Christians who does not believe in the virgin birth, nor in the star of Bethlehem, nor in the journeys of the wisemen, nor in the shepherds coming to the manger, as facts of history.
Marcus Borg