My point is that racism is far more than discrete instances of people yelling racial slurs. The racism that affects black people in the USA is perhaps mostly no

My point is that racism is far more than discrete instances of people yelling racial slurs. The racism that affects black people in the USA is perhaps mostly not that sort of racism (though if I were black, I'd surely have many more of those types of anecdotes to point to than the several I have), but more subtle racism is pervasive and has a huge, constant effect.