> “Protected class” means stuff like race, sex or veteran status.

“Protected class” is an (American) legal term, with situation-specific definitions. (It means different things in federal employment law, federal public accommodation law, federal fair housing law, and the various states employment, public accommodation, and fair housing laws of each of the States.)

It is entirely unclear what it means in the Ruby CoC, and the explanation in the discussion thread is literally “everyone knows what ‘protected class’ means” which is obviously entirely false. Its a term used by someone who has some overly precise, overly generalized idea of what it means, doesn’t realize that they are wrong, and thinks everyone agrees with them.