Islam and Christianity both have especially bloody histories..?

I defy you to find a single reputable source for your farcical statement: “The Spanish Conquistadors proudly wrote about slaughting [sic] unarmed natives to please God.” You won’t because it’s a lie. Whether they actually did on some occasion kill unarmed Indians or not, they certainly never would have admitted to it in writing. As believing Christians, they (and, as they certainly knew, their monarch and Church) wanted souls converted to the one true faith; dead people can’t be converted. And as proud soldiers, they knew there was no glory in killing unarmed combatants.