this sort of psychologising diagnosis of strong political conviction often serves as a cheap, supremely condescending trick for pathologising and thus dismissing those with whom we disagree. A good deal of work on the psychology of conservatism is like this. The motivating question, "What the hell is wrong with these people?" takes it for granted that there is something wrong with "these people," and thus that disagreement with them is based not on a reasonable difference of opinions among intelligent people of good will, but rather on some sort of deep-seated defect of character or cognition in the "other" insusceptible to correction through civilised discourse.
While I would have used American spellings, I couldn't have said it better myself. I wish I had said this.