No, she's not, because there's no such thing.
To put it into simple terms, men and women have slightly different brain structures. That's stuff such as the relative size of different parts of the brain/synaptic density in certain regions of the brain, such as the corpus callosum. These differences don't have any effect on a person's IQ or intellectual abilities, but it seems to be these type of differences between the structure of male and female brains that seem to be responsible for which gender a person identifies as, regardless of their physical features. Brain studies and the like have indeed confirmed that the brains of transgender men more resemble those of men than women, despite them being born with the body of a woman otherwise, and similarly trans-women have brains more similar to women than those of men despite otherwise having a body of a men.
There are no such differences between the brains of blacks and whites, or any other such biological differences between them that would produce the same effects as the gender dysphoria that transgender individuals feel when they're not able to identify as their actual gender. If there were, eugenicists and white supremacists would have surely found that shit in like the late 19th century/early 20th century, because that was exactly the type of shit they were looking for to try and prove that blacks were biologically inferior. They found nothing, and had to rely instead on shifting the perspective of black skulls compared to white skulls and just displaying them at different angles and shit to "prove" that blacks were more apelike and shit. With no such differences existing, it's impossible for transracalism, in the context it's being used here, to actually be a thing.
That's why this women is hated--because what's she's saying is complete nonsense and is just a desperate bid for attention, that just muddies the waters and hurts transgender activism because of people conflating them when there's no link. And it's quite clear that she's only doing this for attention because she's done shit like trying to sue a HBCU for discriminating against her being white, in addition to all kinds of other nonsense in her past. She herself doesn't even believe what she's selling, so no one else should.
It's just complete hogwash, and people not having the time to look that up and just absorbing what she's saying without knowing any of that is why she's so hated: because it's unscientific nonsense that she herself doesn't even believe and just causes confusion and hurts stuff like trasngender causes for no reason because of people linking the two of them because of her when they're absolutely nothing alike (one's based on scientific fact and centuries of history, the other complete nonsense and only based on her made up attention-seeking stories).