Whether she has directly experienced racism or not, because of systemic racism - that is when a system produces racist results even if most people in the system are not individually racist - she said herself that "...regardless of class and income -- parents who feel they have no choice but to prepare their children for the chance that they could be targeted, including by the police, for no reason other than the color of their skin."
I don't know what to tell you but I believe Trump's rhetoric is racist, I hardly find it worth arguing.
Here, have an upvote for participation.
Technically you are correct, a member of any race can be racist, but in the United States, Black people are more likely to be the victims of racism than the perpetrators. So when you are asked if your rhetoric contributes to a climate of a "hate and racial strife", telling an audience of people you can't see, and an African-American moderator that you are the last racist person in the room is an insane kind of thing to do.
First of all I am against all censorship as a principle, so Twitter, etc shouldn't have blocked the story. However, the story is pure garbage. No reputable news service is carrying it, because there is nothing verifiable in it.