This is exactly correct. There are a lot of assumptions at work here - racism is when you put on a hood and shout slurs. It's something alien, something out there. It's done by people on the very fringes of society, powerless, probably poor or otherwise marginalized. It's also something in the past, a past that ended completely and totally at some vague date and now has no influence whatsoever on modern society, no matter how prevalent and ingrained it might have been even a few decades ago. And we shouldn't talk about that past too much - at least not the parts after the Civil War brought a convenient and triumphant "happy end" to the narrative - because that might make people feel bad and divide society.
Racism certainly isn't something that lingers on or is regaining strength. It's not something that walks through the halls of power. it's not something that fills social media and drives cultural narratives. And it CERTAINLY isn't something that's inside all of us, buried in unexamined biases and snap judgements. Because if it was, if it was still a real and even growing problem, that would make us uncomfortable. It would make us have to question society. It would make us have to question ourselves. And that's very scary.
So when an actress is viciously attacked because she's the wrong color, when hate flows freely in the discourse for years based on her race... that can't be "racism." It must be something reasonable and excusable. Because otherwise...