I have always been fascinated by the phenomenon of mass hysteria and the ease with which a mob mentality can develop, leading people do commit the most despicable acts against their fellow man. History brings us many examples of this, but two which I find most intriguing are the Inquisition and the witch trials. Naturally, both involved Christianity, and this should be no surprise given the bloodthirsty god described in the bible.
When I can find the time, I'd like to read up on the Inquisition. It strikes me as still being very relevant today given the rhetoric coming from the Christian extremists. If anyone has found any good books on the subject, I'd appreciate some recommendations.