I've read the doc. At first skim, I thought it was going to be a reasonable "stop the echochamber" style doc, that points out issues with over-loving diversity without thinking about the impact of it, and that decries the strong-left culture at Google that can be alienating to right-leaning employees.
But in reality, dude went full /r/TheRedPill and The_Donald on this. I think the best description I heard of the doc was 'right diagnosis, but overall lazy'. The doc called for reinforcement of stereotypes and removal of mandatory bias training. I can see how someone can see the surface and identify potential problems with it, but ultimately bias training is created by people with real credentials to be doing so -- psychologists, analysts, people who look at data and key results, both empirically and academically. To assume that a privileged engineer would know better than this hardworking team is pretty insulting, I think.
There have been some ridiculous, over the top reactions to the doc, but I think it was mostly a case of someone of privilege not understanding why diversity programs are in place and feeling empowered to shit on people without any because they scratched the surface of problems. Again, /r/TheRedPill style content.
It did spark discussion, and I think the consensus is that while there are some valid points about the left-leaning employee base, the overall doc fails to adequately dig into the matter, and does so in a hostile way while decrying anyone who disagreed with OP.
opinions my own.