This is a first time post for me.

My group has been trying to set up the dresden game (character..city..understanding the game for several weeks).  Most of the members are very experienced AD&D players.  We finally got together for the first adventure yesterday. 

The problem I have is understanding how the internal team social dynamics should impact the game.  My character's high concept of Dragon's Bargain World Balance is somewhat vague.  In essence it means that my sponsor wants the world to be balanced as far as right/wrong and bad good.  In the final adventure battle we found a killer of six people that happened to be a ghoul.  The ghoul unfortunately was young and didn't understand it couldn't attack and kill humans without repercussions.  Fortunately the ghoul gave himself up willingly and admitted what he had done and then said he could help make it right by helping other ghouls how to live without killing.  In my book that is a suitable "redemptive" quality and I took no action, indicating to my GM that any action against the ghoul would be against my high concept.  The rest of the team heard that and proceeded to socially attack the ghoul

The ghoul fought back at this point.  When my turn came around again I offered it a bargain, I'd heal it if it would surrender.  Again the ghoul gives up willingly. When he did I indicated to the team not to further strike the ghoul.  Unfortunately the team persisted in killing the ghoul.
I spoke with my GM after the game and indicated that since the team had gone against my high concept after I had made the bargain, then I could no longer trust the team.  That aspect is now added to part of my trouble as a consequence.
I'm not sure this is in keeping with the game concept.