"Further, I don't agree with the idea of the Justice Department investigating affirmative action programs at universities under the theory that they might discriminate against whites."

Good, because that isn't "the theory" under which they are being investigated. 

http://www.newyorker.com/news/news-desk/the-uncomfortable-truth-about-affirmative-action-and-asian-americans

Of course, all "race-based" methodology is inherently racist as it subsumes massively different cultures and cultural experiences under puerile similarities like color and language. "They all look(sound) alike to me," is the unspoken premise of all racial categorizing, regardless of political orientation. 

"That all people of one race must all share the same beliefs, and individual and political goals (which, of course must match the categorizers) or they can be dismissed as self-hating or worse," is the added favorite premise of the political Left in general, and, ironically, white supremacists.