Yes, yes, yes, I get it.  It doesn't matter what examples I trot out, you're going to fire back rationales for why it's an exception, the rarity, explainable politically, not as bad as it looks, can be offset by something similar in Christendom ... you're never going to be a neutral arbiter of history.  You WANT a certain outcome, and that outcome is for the Europeans to be the villains and for the other empires to not be subjected to the same kinds of standards or scrutiny.

In your head, there will always be a difference between the Christian's killing everyone in Jerusalem when they conquered it, and the Muslims slaughtering everyone and burning Carthage to the ground when they conquered it. Trying to kill the Aztecs to a man will be somehow different than trying to kill the Armenians to a man.

You don't even allow for variations within factions in the caliphates, let alone individual differences in caliphs. That's not at all honest.