@Novella4
We'll have to agree to disagree.
If my sibling started making - rather vague, let's face it - accusations in public my response would be the same. 'I'm happy to discuss this with you in private, but I am not going to use the media to conduct a tit-for-tat you-said/no-I-didn't spat.
Apart from anything else, everything gets exaggerated and it all becomes all-or-nothing, there is no ground for reaching an understanding. Of course, if you take the approach that either side is completely right/completely wrong then that style of 'warfare' works for you. But I suspect a lot of what has gone wrong has been misunderstandings, culture clashes, reaction to past trauma, and whole lot of other 'stuff' that isn't about the big issues of racism, colonialism etc
None of the issues you put forward will be solved by their current course of action, all that will happen is people will double down and both sides will become more entrenched.
H&M's statements have said that they wanted to continue to do royal engagements, that they supported the Queen, they use the titles that were awarded by the monarch as head of the institution of the royal family. They are very far from being republicans!