Bingo !
I don't have a problem with biracial people but to say that they are interchangeable with black people in a world that values white supremacy is very problematic.
You can't say that though you'll have some negro say we're all mixed because we might have a white great great great grand parents ...and that's the same as someone who currently has a white mom or dad lol
The black race is the only race that claims mixed people I don't even see Asians really claiming tiger like that etc