I don't know if the complex fulfillment of messianic expectation can be reduced to 'love thy neighbor' or if that principle really can be stretched as far as you'd like it to go.

As far as the Inquisition, the historical reality falls far short of the Monty python esque black legend our culture has inherited from protestant Europe. Really, trying to portray the Inquisition that way has more to do with historical anti catholic bias than facts and figures. These sorts of analyses always tend to ignore inter-protestant sectarian violence or any of the killings of catholics by protestants , usually out of ignorance but often due to selective framing for ideological purpose.