"Racism" is a system where a racial group with a monopoly on power in society arranges the rules of that society to continue priveleging their own racial group. "Bigotry" is when you dislike someone because of their race. And the comments that everyone on HN are getting all in their feelings about are neither bigoted nor racist; they are basic, uncontroversial observations from people who have been doing anti-racist and anti-sexist work since before most members of HN's audience had heard either of those terms.