Google around and you'll find a zillion examples like this one:
Twitter, Like Other Big Tech Companies, Comes Up Short on Diversity
http://bits.blogs.nytimes.com/2014/07/23/twitter-like-other-...
Once you realize that words and phrases like "diversity" and "person of color" are attacks, you'll see the hostility everywhere. For example, when you tell a white man that your company, conference, meetup, etc., is trying to increase its "diversity"—and which one isn't?—what you are actually telling him is we need fewer people like you. And when you realize how many white men support "diversity", et al., you'll understand how bizarre the whole situation really is.
The solution, by the way, is to grow a thick skin, suck it up, and deal. Indeed, there's no other choice at present; in our current political climate, complaining often works wonders for politically favored grievance groups, but no one wants to hear complaints from white men. The political power needed to change this is immense—far greater than the current pathetic attempts to push back (Republicans, the Tea Party, etc.). Best learn to live with it. (I still find it fascinating, though, which is why I can't resist commenting on the phenomenon.)