> If your answer "maybe some of them?", do you think I have a point?
If your point is that some people are more rigorous in their research than others then yes, that is true.
But if your point is "Apple should have taken longer to make the the decision", then no.
Apple has a fiduciary duty to its shareholders to protect the company from legal risk. The problem (from Apple's point of view) isn't whether the book taken as a whole has merit, or the subtleties of whether it's fair to fire him.
It's that a new people manager is very prominently and repeatedly on the record as holding views that will absolutely be quoted in successful lawsuits against Apple by the first female or non-white report he handles badly. These quotes will be Exhibit A. Apple will lose. It won't even be close. This is basic stuff for HR and legal.
Reaching this conclusion doesn't require "ample due process". It takes 30 seconds to read any one of the many passages the petition carefully enumerates, and then another 30 seconds to verify the quote is real. Done.
HR's job is to protect the company. They failed by allowing him to be hired. Firing him within hours is the least they could do.