Why? Its not impolite. Its not a firebomb. Its a question. He didn't realize that there was an Edsel between the two Henries. Completely reasonable. Everyone doesn't know every fact of history.
I've spent 3 days, on and off, considering how to respond to this. Quite simply I don't see any way to answer such an arrogant, supercilious and mean-spirited point of view.
I hope that your omniscient self is quite happy as I cannot comprehend how you can have friendly relations with us mere mortals who, regardless of how educated we may be, do not share the quality of omniscience.
I’m backing you, Costume guy. Your posts that I’ve seen have always struck me as being both reasonable and mature, 2 qualities that are very rare in the internet world, which is rife with immaturity, snark and arrogance. And I know that YOU actually know what the verb “to arrogate” means😊