There could be business goals though: it improves people's public opinion of you and in this case may help protect them from lawsuits.
This link at the bottom of the page has some more info... http://www.google.com/diversity/
The data Google just posted contradicts you. 61% of Google employees are white, while 80% of the total US workforce is, see e.g. http://bits.blogs.nytimes.com/2014/05/28/google-releases-emp...
That means white people are under-represented at Google.
The group whose representation is most diverging from the population as a whole are Asians, who are hugely over-represented.
Overall, the numbers show that Asians are over-represented, which may explain much of the under-representation by all other groups. So the story here is certainly not one of "white male preference in the job market". You might be right about male, but not about white.
Writer research failure.
Also, just to emphasis what others have already replied to you; Whites are actually underrepresented at Google relative to the ratios seen in the rest of the workforce.
Likewise, if the number of comp sci graduates in the country is 5%, the same question can be asked. Who is the one being unfair?