She's not just a garden variety idiot, she's also a genuine black supremacist:
-k
Of course she is. You know who else was a black supremacist? Malcolm X. There's an argument to be made that MLK could only preach peace because the alternative was a black panther movement that was threatening violence. That peace became an option because the United States government's choice were that or violent chaos. While I think this woman is an idiot, radicals like her are important to give credibility to more moderate advocates on her side.
More importantly, I think it's important to see why she would be radicalized. She's looking at a society that has shown systematically that black people's lives are worth a hell of a lot less than white people's. I know there's a lot of conservative snowflakes who don't like to recognize that fact and that in and of itself denies the violence and death that have been brought down upon black people literally by government agencies. Violence and death, mind you, that is not experienced by white people. I don't have to worry about getting shot by a cop for complying with them. We have numerous incidents on video where black people, despite trying to comply, are still beaten or even murdered by police.
So yeah. She's a radical and is using extreme language and frankly I think some of the things she says are idiotic. However, she doesn't exist in a vacuum. Her views are in direct opposition to a society that she sees is gravely threatening to her and people like her. It's a violent reaction to violence perpetrated against her and her community.