Malarkey. Far more innocent blood has been shed by "presidents" and "premiers" and "parliaments" acting in the name of the People than by any Christian king acting in the Name of God. I defy you to back up your assertion with evidence.
Well, duh; the former live in times when the population is over an order of magnitude greater. Using the correct measure (percentage of total population) we find, for example:
So great was the devastation brought about by the [Thirty Years'] war that estimates put the reduction of population in the German states at about 15% to 30%.[42][43] Some regions were affected much more than others.[44] For example, the Württemberg lost three-quarters of its population during the war.[45] In the territory of Brandenburg, the losses had amounted to half, while in some areas an estimated two-thirds of the population died.[46] The male population of the German states was reduced by almost half.[47] The population of the Czech lands declined by a third due to war, disease, famine and the expulsion of Protestant Czechs.[48][49]
A lot of modifiers there. You’d exclude the children’s crusade, the other crusades, the Inquisition, and all the native peoples of the Americas slaughtered by the Spanish Conquistadors all acting under authority of Christian Kings, so I gather. Right?
Oh, and what of Liberty? Under the Christian Kings you’d include in your self-defined subset of the “perfect” what Liberty was had to the People so that great human invention and development occurred? What was the literacy rate under these Kings, for example? Or was the literacy of a peasant a capital crime?