Well it's very easy for you to view this as trivial since it's just something you've read about, while for black people this is just a part of our lives. It may not impact us 24/7 365 days a year but if you know anything about stalkers and the cat & mouse games they play with their victims, a racist event can popup at any given moment whether you're expecting it or not, irrespective of how much effort you put into not dwelling on it and to just go about your life without thinking about it too much or even anticipating the next incident.
Racism is pervasive and all encompassing even when we strive not to react so negatively to the things it causes to happen to us that we cannot function or progress in our lives both personally and professionally. On top of that, a bunch of ignorant, uneducated and oftentimes stupid people opining on "the problems with the black community" and black people in general, claiming that we just want to make white children feel guilty about things they had nothing to do with is really disingenuous when compared to the negative light black people have traditionally been cast in, even when the racists know the things they are saying are not true. It's no different than the behavior of the Republicans who seem to be unable to break free from the hold Trump has on them, not even in self-preservation.