Out of Date Discussion
The craziest thing about this situation at Google is that the very question of "should a company have a diversity policy?" was effectively settled decades ago. Even in America.
IBM has had in various forms an active and successful policy of employing and promoting strictly on merit since the 1920s (when they started putting ladies into management roles) and especially since the early 1950s. That didn't do them any harm. Whatever one thinks of their corporate performance over the years, one cannot blame episodes of underperformance on their fair minded employment policies. In the same timeframe they have had stellar episodes of over performance.
So for anyone to think it's necessary to have a debate today, right now, over whether such a diversity policy is necessary, effective, appropriate, fair, acceptable, is dark ages thinking.