text: "if they refuse to listen even to the church, treat them as you would a pagan or a tax collector."
  
  This hardly supports your position. How did Jesus treat pagans and tax collectors? Traditionally, the author of this passage was believed to be a tax collector. Jesus was known for eating with tax collectors and sinners.
  
  Most Christian denominations have used this as a basis for shunning and excommunication, but that is not the only way to read it. It seems cut and dried to you, but for some of us, Jesus counsels reaching out and accompanying.