The parable of the Good Samaritan is more than just a nice story to remind us who our neighbor is. In the first century, this story would have ruffled many feathers. Samaritans were hated by the Jewish religious people. They were considered half-breeds who had distorted the true religion of God.
The religious leader in this story sought to justify himself by asking Jesus to clarify who his neighbor was. When Jesus told the story of the Good Samaritan, he knew he was challenging acultural standard in the Jewish community. Jesus not only made the Samaritan the neighbor, but also made the Samaritan the better example of demonstrating God's love to people. The priest and the Levite, people who should have been demonstrating God's love, did not even stop to care for the man. Jesus' story lifts the Samaritan to the role of being the example of what the Jewish people should do. That would surely have ruffled feathers.
If Jesus were to enter a modern church today, I think he would tell a similarly challenging story. He would tell the story of the Good Muslim or of the Good Homosexual, and set them up as the example of the person who demonstrated God's love better than some in the church. This should serve as a challenge to us in the church to demonstrate God's love by caring for hurting, broken people in the world around us.