When we draw lines in the sand to separate us from other believers and from the poor we purport to serve, we are like two people on the side of a swimming pool fighting over doctrine while a child goes under for the third time.
Being a Christian is not easy because it requires that we do things within a certain framework. As Christians, we have chosen to follow one who set the example for us. Jesus said that we must forgive someone as many times as needed.
Land employs both the Golden Rule and Jesus' Greatest Commandment to justify shooting someone to death if necessary, so long as there is a perceived threat against someone you consider your neighbor. But then, why is there nowhere in the Bible that Jesus endorses violence?