Like Naomi, I have often found that funerals explode long-hidden rifts in families. Not from personal experience, thankfully, but my mother had such a furious interlude with some of her brothers (she had 5) that they never spoke again.
In this case, I think that hurt has been piled upon hurt and that it is all so raw, still bleeding in fact because Meghan is now having some of her statements publicly pulled apart (especially the title and security bits). Far too soon for any real rapprochement - I just hope that more division and pain does not ensue. I read that Harry will have to isolate, apart from actually attending the funeral. If so it is probably for the best.