they already do look at that, they have diversity quotas that are considered more important than technical skill
This is good news for the competitors of Google who hire on suitability for the role.
What do they consider diverse? I'm not American, am I more diverse than a black American woman?
According the Damore's complaint, they consider diversity to be non-white and non-Asian, or non-male
Google has far higher proportion of non-Americans than black people (let alone limiting to American and women). It's not even a close comparison. This sort of extreme ignorance is the sort of problem that D&I initiatives are struggling against.