There's at least a vaguely interesting mismatch happening here. There's clearly the component of violence and likely coercion acted upon her ancestor, but in addition there's an interpretation of somehow being guilty by blood. It's like, no mother fucker, it's not the DNA connection that matters - it's the institutions of power and property that uphold differences even today. What do her "white" distant relatives look like wealth wise comparatively? Why would it be easy for the white relatives to trace ancestry, but comparatively harder for her? The property relations are far more determinate to contemporary conditions than what silly little bit of genetic matter someone has.