Well, I don't think she said all people are psychopaths.
She asks the definition of a psychopath. That definition seems to be "lacks empathy".
Why is she talking about empathy.
She's saying "whiteness" lacks empathy.
She says "Whiteness damages our humanity"
She says "We need white people to heal ourselves from this damage to our humanity, patriarchy, white supremacy has inflicted on us, become fully human again".
More or less, this is all she said.
She doesn't say "white people are psychopaths." She doesn't even come close. She uses the term "whiteness" and that "whiteness" for her seems to represent everything that comes from slavery and segregation, especially segregation.
With slavery you could own slaves, then they said "no more slaves" and these people, almost all of them white, decided "fuck this shit, we're not letting black people get ahead, ever", and THIS is what she's talking about.
So....