I completely take your point about Charles having long championed causes like the enviroment and social inclusion, often well before they were widely accepted or fashionable. He deserves credit for that foresight and the personal resilience it must have taken to keep going in the face of mockery or indifference at the time.
That said, I don’t think it's about Charles abandoning his core beliefs or caving to a reactionary crowd. Rather, it’s about being attuned to how those beliefs and values are expressed now that he's King, and the context in which they're recieved. There’s a line between staying true to your principles and failing to adapt when the world—and your role in it—changes.
Much of the critcism swirling online is not, in my view, worth taking too seriously. But some of it does come from people who feel unheard, alienated, or even just confused by the messaging from the monarchy at times. That doesn’t make them right, but in a constitutional role built so much on symbolism and public sentiment, perception does matter.
So no, I don’t believe he should bend to bigotry—but I also don’t think being thoughtful about public response is the same as surrendering to it. It’s a delicate balance, and I think it’s fair to talk about how well it’s being managed.