How much of that 2/3 is college educated in the software industry, and is technically competent enough to pass the bar at Google?
But that's being overly provocative.
Ultimately this started with you saying that a question about diversity could be heard by some as a dog whistle that only leftists are welcome.
I simply don't agree with that premise. I do think there is a percentage of people who think diversity is a left-only issue, but I don't think that's 2/3rd of Americans. Then again, Donald Trump hovers around 50% approval rating regardless of what he does, so maybe I have too high an opinion of Americans.
So if you don't want to hire assholes who think "diversity" is a dog whistle, you hire leftists.