Reverse discrimination is a funny term, often used disparagingly by those on the right to refer to affirmative action policies with which they don't agree. However, it's very use implies acknowledgement of previous discrimination, and the need to set things right.
So, tell me, do you think that the 60 or so years of these policies, policies which have been vigorously fought against in just about every way, have been enough to return things to a state of equilibrium given the 400 years of discrimination prior? I don't. And I think that if you were on the short end of that exchange you wouldn't either.
So yes, I used the past tense in reference to the legal type of discrimination, but it continues today in extra-legal forms. For example, did you know that a white man with a felony conviction are twice as likely to get a callback for a job interview than a black man with a clean record? I think there a clear indication that work remains to be done, that racial discrimination is still alive and well.
It really doesn't matter whether you agree or not, your agreement is not needed to establish that racism still affects the US in many different ways. One could take the fact that racial discrimination is no longer the law of the land as progress I suppose, but I have a hard time feeling gratitude for work towards fixing something which should never have occurred to begin with, something that's existence is denied by many people (of which you are one), and which literally costs the lives and freedom of Americans. Every. Damn. Day.