Why are many black people called "acting white" if they don't fall into negative stereotypes?

[Kiyanni Lewis]

For example, if a black person doesn't fit the ghetto archetype, they're regarded as being stuck up, uppity, bougie or white. If a black person is into fitness (especially a black woman), then she is regarded as trying to look white. I've been told that after losing weight. If a black person rats organic food or shops at Trader Joe's, Whole Foods or Farmer's Market, they're told that they're trying to be like white people. If a black person hangs out with white people, they're called sellouts. If they date non-black people, they're sellouts and self haters. If they move out of the hood into a nice neighborhood, they're trying to be like white people.

I don't get it. It's actually an insult when you think about it. Why are the bad things called acting black and the good things called acting white? Even when non-blacks fall into the ghetto stereotype, they're seen as low on the totem pole.

Thoughts? Thank you.