Earlier quoted context omitted.
Say you're, I don't know, the person who gives driving license tests. You fail a person, person claims you are racist against . How do you make sure no one has examples like that? Just always pass literally everyone no matter how bad a driver they are in case they're going to later claim discrimination? You can avoid explicit examples with evidence attached ("he called me a n-word and fired me, see ") but I don't see…
That kind of thing would not hold up in court without a strong pattern proved or additional explicitly discriminatory behavior. Discrimination is surprisingly hard to prove, in fact.
(I edited a second half into my original comment that might make this clearer, though I did that before I saw your reply)