Well Sapolsky sure seems to love to make dubious absolute statements and oversimplifications in his lectures, and yet he still says that pastoral nomadic honor cultures foster strict rules of hospitality, which is not the same as hospitality in and of itself, even if it can be an amplyfiyng effect. I would be more inclined to agree that "strict rules (of hospitality)" and "violent enforcement (of subservience)" are flip sides of a coin. Note that "honor killing" is a very loaded term and quite different from domestic violence and retribution.