I am often asked by clients how to deal with people who block their attempts to bring the social web into organisations. I still have the emotional scars from dealing with the same sort of people myself, so I remember the feelings of frustration well.
I didn't understand it fast enough but the most important lesson I learned about dealing with these people was that they suck energy. By even dealing with them you give them power. Instead of focussing on moving things forward you get dragged into dealing with their resistance.
But remember you are not going to "convert" everyone and nor should you try!
The way to deal with this is to find ways to route around them. Isn't this the way the internet was meant to deal with obstacles? Instead of clashing antlers find a way, or more often than not many little ways, to allow them to keep thinking what they think but do what you have to do anyway. I always have the image in mind of nature re-populating concrete industrial landscapes. Roots and shoots emerging through cracks and weaknesses in the apparently solid structures and gradually weakening them until they crumble.