You've admitted before that your understanding of monarchial government comes almost exclusively from Europe. That's incredibly short-sighted, at the very least.
"Europe" is a pretty big tent with a long monarchical history. In this case, I think if I could show that there were many decentralized European monarchies, that would be enough to refute any necessary connection between centralization and monarchy that was argued for on purely empirical-historical grounds. And while I'm sure expertise in the history of say, Asian monarchies would be useful, it is no more necessary than it is necessary to be an expert on the history of the Roman Republic to think the American one is a good idea.
Moreover, since I primarily promote monarchy for Europe, on the European model, why wouldn't European monarchies be the best history for me to study?
Because the Confederacy was explicitly predicated on white supremacy and black enslavement.
Well, true, but there were slave states in the Union too, and moreover, many of the colonials had slaves and the Founding Fathers did not even end the slave trade. So the Continentals also believed in these things, or at least enough of them did to get the others to go along with it.