Let’s skip by the obvious, like math being racist and using skin color to make college admissions decisions. Here are three real-life examples:
1) The doorbell to my apartment rang around 4 pm, and when I looked through the peep-hole, there was a black man wearing work clothes. When I asked him what he wanted, he said the office sent him up to check the A/C. I then told him to wait there while I called the office to verify (I never complained about the A/C). They told me they sent nobody up. When I went back to the peephole, he was gone.
2) A rapist was on the loose, and the police issued a sketch and description - a black man, height, weight, etc. Several days later, I got on the elevator and a black man came in after me. I pressed my floor, and he pressed nothing. When I got off, he followed me, so instead of unlocking the door to my apartment (where he could push in behind me if he were the rapist), I continued down the hall and rang the bell of a neighbor, who let me in. The black man continued walking down the hall.
3) Some crazy guy was standing in the middle of a busy street, screaming. I called 911 to report it, before he got killed or was responsible for causing a horrible accident, and they asked for a description. I described him as a black man, around 60, and tall and thin.
NONE of these things are racist.