I agree. Verbal racist abuse is anyway the the least violent form racism. Despite being vile and unjust, at the end of the day, it's still just a word and the receiver can choose not to be affected by it. Rather, it is these types of hidden masked forms of racism that are so much more dangerous.
What was learned from the Amy Cooper episode, and from what I believe is happening here, is Karen's posses an instinctual level of hysterics, that would make a neutral onlooker believe she was under serious physical danger from a black man. And if the police turn up to such a scenario, it always ends very badly for the black man. Her completely over the top reaction is cynical racism in itself, and that's even before get to the verbal abuse.