It’s not racist for the simple reason that whites are still a majority whether they will openly admit it one-on-one or not.
Minorities do these type of things not for the sake of supremacy [they are the minority, duh!], they do it so they can maintain their cultural identity in a white world.
It is not racist to make a website that markets to blacks, asians, indians exclusively, because these cultures have had little air to breathe in a world where the majority culture is white.
When one speaks of oppression in this day and age, they are referring to cultural oppression and the inability for any culture other than a white one to be seen as a majority or “the right way”.
For instance – if you see a business run in a “black” way, you wouldn’t see them as professional because the “white” way is right and professional.
That’s oppression of the most subtle type.