It's hard to take seriously the idea of a "naturally tolerant nature" from someone who tries the "some of my friends are black" defence. Or from someone who keeps banging on about a "career criminal" as if that, in itself, is enough to excuse, justify, or trivialise his death. It isn't about just Floyd anyway.
Also, I'm not sure you are in a position to criticise their "flawed dismantling of history", unless you can demonstrate a more nuanced interpretation yourself than we've seen in the past. Consider the claim that "[the British Empire] civilised the world", that you've made at least once in the past*. There is no subtlety or nuance in this at all, no acknowledgement of the fact that the British Empire invaded the places they ruled, subjugated the people who lived in those places, and treated them often like second- or even third-class sub-humans. If you're going to rant about the vilification of British history, then you too need to stop glorifying it, and maybe be more critical of the actions in the past. Not necessarily condemning them per se, because it's too late now anyway, but at least being more honest about the human costs involved in "civilising" the world.
Who knows where this will all turn out? The lessons from the past suggest that this massive upheaval will lead in the end only to token gestures and piecemeal changes, and we'll be back again in 2050 still seeing the same sort of protest.
*
https://www.theanswerbank.co.uk/News/Question1490405.html