> I was rejected at Google for mysterious reasons after passing the all-day and hiring committee. No way to know, but I am indeed pale, male, and stale (and a citizen).

There is no evidence to support this. Google headcount is a scarce resource / bottleneck for a lot of teams, so it's just as likely the headcount was reallocated or reorged during your hiring process. There's also more than one hiring committee for some roles/teams, and you may have been vetoed by the second.