I appreciate you taking the time to write this thoughtful response. I am sympathetic with some of it, and certainly I
could have been more diplomatic.
>"But also: you could have just put more effort into it. As it stands, the comment you're talking about could be persuasive only to someone who takes your word on things, because it doesn't support any of the arguments it makes."
No one reads long walls of text, not least in threads with >1000 comments. Concision is a great virtue in nearly all communication. I would say two things to the refrain that I didn't 'support' any of my assertions, and that my post 'could be persuasive only to someone who takes your word on things'.
First, they are a form of 'immanent critique'[1]. Anglo-American society recognises some basics moral and political norms. These include the idea of equality and that people shouldn't be privileged because of blood or race, the idea of liberty and that one people should not coercively rule another, and the idea of democracy and that a people ought to choose its own government. I made some simple observations to the effect that the British monarchy egregiously violates all three.
In this sense I don't need to argue for my evaluative premises because they're all bromides within our gestalt. But if you juxtapose them with some basic facts about the monarchy, suddenly it becomes obvious that there's a catastrophic contradiction. I am working from premises most people accept to a surprising - but I think obviously correct - conclusion.
Second, this same burden of 'support' is not being applied to those on the other side of the conversation. The person to whom I was responding said nothing to support their assertion that the Queen was a 'moral authority' other than that the Queen didn't succumb to personal scandal. A standard that lots of very bad people meet.
[1] https://en.m.wikipedia.org/wiki/Immanent_critique