In order to understand parable of the good Samaritan, we need to think of modern day non-religious or non-Christian people in the Samaritan's place. Instead of Samaritan, we would say something like Taliban member.
What concerns me is that the "good Christian answer" would be that such a person was not the ones were justified. That we would be forced to say, "No, Jesus, those people who did good thing for the poor injured person were still in the wrong, and those who passed by him were in the right as long as they believed in You."
Any time you have a theology that would have to insist that Jesus was incorrect, you have a problem.
I think I'm going to have to ponder that passage in context a little bit more...