And thatFair enough,
However, I also took it as Edelgard being offended by the mere thought that a dragon or "The immaculate one" was the one leading humanity rather than a human. Hubert especially wants jack and shit to do with divine beings and besides Byleth in the Crimson Flower route he's the one who has her ear. That's what I meant by "opposing core values". I don't see Edelgard being happy with any result that doesn't mean the end of Rhea's leadership and by extension the Church's because of her belief that humanity should be steered by humans themselves.
Is another situation getting ready to work itself out. Rhea's pretty much resolved to give the Church to Byleth and had just about given up on getting her mom back when what she expected to happen didn't. She was done. Except in Crimson Flower wherein Edelgard reenacts the worst day of her life and Byleth sides with her. There's also the fact that Rhea and the Church had far less power than Edelgard was ascribing to them. But that's beside the point.