Because it has been a constant bombardment.
Not every case of "pointing out racism" actually points to racism.
Perception of racism in every-fucking-thing, however, IS racism.
If there weren't so many "Racist!" cries, one might be able to stick from time to time.
it may well be that not every case of "pointing out racism" is actually correct. but it is also true that in almost every instance
where actual racism is pointed out, the person doing so is accused of "stirring the pot" or "dividing the country" or engaging in "race baiting".
Are there instances of race-baiting? of course. But it isn't racism, for example, to stand up and protest the total negigence of a police department in investigating the death of an unarmed black teen.
And it isn't racism to want a trial of the person who caused that death.
It is, however, racist, to cheer for any possible failure of the prosecution because someone sees the trial as victimizing a white man.
See how that is.