I've recently been reading/watching some videos and writings by Robin Diangelo on systemic racism - here's a great starting point: https://www.youtube.com/watch?v=h7mzj0cVL0Q. She also wrote the book "White Fragility".
Thinking about that, I'm just wondering how different it would be if one of those people who mistook the employee for the CEO instead turned to the CEO and said "I'm sorry, please excuse me for the instance of racism I just perpetrated against you, I promise it won't happen again." I realize how outlandish that may sound writing that out, but I'd propose that the fact that it does sound outlandish is the main problem. Everyone in the US was raised in an environment that inculcated certain racial ideas, subconsciously or not. We can't address them if we're so embarrassed by their existence as to pretend they don't exist.
Even within her book she claims that no amount of training will solve the issue, it seems that "White Fragility" is just another way for White people to tamp down the anxiety of race relations in the United States, rather than take any meaningful action towards changing it.
If your goal is to truly understand the Black american experience, it's best to start with actual Black authors. The House That Race Built by Wahneema Lubiano is a great set of essays about race and class structures.
"People are recommending a book by an author." Fixed that for you.
I'll give you the BLM, that's an instance of necessary discrimination. The rest ... if the authors advice is wrong, criticise it, if the book or person does something bad, criticise it. Don't just pick out the skin colour of the author, or of someone recommending the book, and use that as a reason why it's bad. That's racist.
[Please note I haven't read the book, and do not know the author, and am categorically not promoting either.]
I can usefully talk about MySQL because I used it in a multi-year project that pushed its performance to the limit. I cannot usefully talk about Cassandra - the most I have done with it is install it.
Similarly, I can usefully talk about the experience of a male Russian immigrant to the US. I cannot usefully say much about the experience of a black woman who lived in the US since birth - I have not lived it, all my sources would be second-hand; my listener would be best served by referring to the sources directly.
I may suggest that to find out about the experience of black Americans, it's best to refer to the words of actual black Americans.