Google is one of the most racially inclusive tech companies in the world. It really tries hard to fix historical disparities between races in ways that you don't see in most companies, ranging from very active promotion of minorities to programs dedicated to hiring them. The interview process, while not perfect, also tries to erase bias by forcing gender and racially-neutral terms in interview writeups.
I have my own explanation for the problems the article describes, but I think it would be hard to accurately represent it in a HN comment. This is part of a VERY complex situation rivaling the historical Middle East conflicts in resistance to analysis.
For all of its faults - and it has many - Google is trying much harder the most companies to right past wrongs in our industry regarding racism.