It is absolutely essential to keep in mind that there have been butchers, lechers, slave-abductors and so forth in Christian history, but they were acting outside-of and against the precepts and example of Christ, acting (at their worst) in disobedience to their own authorities, were seen by their more devout contemporaries as scandalous, and are seen in retrospect as abhorrent.
By contrast, the butchers, lechers, and slave-abductors in Islamic history were acting in accordance with the precepts and example of Mohammad, acting in conformity to their authorities, were seen by their contemporaries as devout, and are seen in retrospect (by fellow Muslims) as exemplary.
The more religiously observant a Muslim becomes, the more he or she wishes to conform to the Hadiths, to the Koran, and to Mohammad himself; and the more damnable their behavior becomes.
That's the utter perversion of it all.
Who was acting “...in disobedience to their own authorities”,..in the murder and virtual annihilation of “heretics” in France? In fact were not officials and citizens threatened with punishment themselves for any lack of cooperation? Was it not by papal decree?
“In retrospect” who sees such acts as abhorrent? Or are justifications offered up?