One could argue about the intention of affirmative action, but I don’t think one could argue that it’s not racist, using the dictionary’s definition of racism.
As is often the case, the dictionary gives multiple definitions.
http://www.dictionary.com/browse/racism
You're using definition number 2, the person you were responding to was maybe using definition number 3.
(Although we get it, your point still stands.)
What I was trying to say, without saying it, is that rasism is not what the cultural Marxist are trying to sell - “power + privilege”.