You claim oppression is fictional - so I guess it's possible you don't.

You say you are pointing at the opportunity costs of protesting oppression. They are only opportunity costs if the oppression is not real - otherwise they may be part of a necessary struggle to obtain opportunity. Do you really think that there is no anti-black racism?

You may be fed up with people bashing white people on the internet - I am too. But that is no excuse for making overtly racist statements against black people, a behavior which is certainly counterproductive to what you claim to be your true aim.