@Reconstructo,
Reconstructo;152890 wrote:Yes, that seems the crucial difference. How do the crusades figure into this? I've heard cynics describe them as a scramble for loot, but that strikes me as too simple, too cynical. I confess I haven't studied them closely. We could also look at colonialism, bringing culture to the "savages"...Or the uglier parts of the French Revolution, heads on pikes. Are we better killers with the gleam of the ideal in our eyes?
First, it's not the case that either Christianity or Marxism turned out in history to be a unified or monolithic perspective; both original doctrines seem to have become splintered into differing interpretations (Marxism sooner than Christianity).
Second, history seems to show that when men attempted to make practical the original, "pure" doctrine, they arguably altered it, and often twisted it into something entirely different. Wars of dogma and fanaticism not only turned outward against the disbelievers, but just as often inwardly when sects battled for dominance. "Oh! what a lovely day/for an auto-de-f?"
Very few historians would subscribe to a single motive for any group action or event such as the Crusades, just as very few would see, for example, single motivations operating upon the working class (even the use of "class" can be therefore questioned). Reductionism has been supplanted by what Wittgenstein would call "family resemblances"in modern historiography as more and more data and documents become available.
Nothing turns otherwise normal humans into beasts of prey as fanaticism for a cause greater than themselves.