Hey John. I can indeed enlighten you.
Imagine a company that was overwhelmingly non-white, and overwhelmingly female. In this case you could increase the diversity of the company by introducing more white people and more men.
In the case of Google, the stats show the company is (by far) majority men, and the largest single ethnic group among staff is white people. So in this case you increase diversity by introducing more non-white people and more women.
So youcan see that ‘more diverse’ doesn’t necessarily mean ‘fewer white people’ and ‘fewer men’. But it does in the case of Google, and I suspect in the case of almost every tech company in Silicon Valley today.
Hope this helps.