Because of the climate we live in.
You can get away with being racist as long as you're not white.
The sob story in this piece is hardly moving - as someone that's been working in Silicon Valley for the past 8 years, it is an extremely open place and have never seen anything approaching this type of behavior. The truth of the matter is that for any given open requisition for a software engineeer, less than 1 black applicant will apply. That is not our problem to solve (directly, at least) and it is most definitely not something for whites to feel guilty about.
The truth is, in everyone's struggle to be "remarkable" they latch on to what they can and in this case it's to be "that guy" that cries racism.
This type of hyperbole is often encouraged with an attitude along the lines of "the ends justify the means." I took a few classes at a community college in Oakland and it was unbearable.
What is preached is not equality, is not kindness unto others, what is preached is black superiority and an attitude of "white people took what's ours."
A shame really, since all it did was bring race to the forefront for me when before this experience I was more or less happily ignorant treating everyone I came across the same way.