The roots of estrangement of outsiders might stem from their inability to adapt to the habits and rules of their workplace community. Often these people have experienced stress during childhood and thus tend now to be defensive. The problem then is that they often challenge conventions and the hierarchy, usually in a rather negative manner.
What to do about this? Try to involve them and make them a stable and important part of the firm's efforts. Once a goal has been agreed upon, allow them to work out for themselves how to get there.