That's a bit of a daft statement to make.
Because I'm white, I have no idea what racism feels like?
I know how racism makes me feel. Racism is disgusting behavior. It disgusts me. I find it abhorrent, the same with sexism or when someone mocks people with disabilities.
I can and will call someone out if I witness them behaving in a way that treats another person differently because of their physical traits. That is textbook discrimination, and if it happens to be because of race, it's racism. Anyone can call it out. How are you finding this difficult to understand?
Anyway, back to Harris. She's running a perfect campaign. No gaffs, no controversies (apart from the media manufactured ones), and she's in a good place to win bigly. The media have played their part in making this race as close as it is with their 'Harris needs to prove herself" garbage. The other guy is a convicted felon and adjudicated sex offender, which is just fine apparently.