He doesn't refer to that when he writes orthodoxy. He is referring the spiral of purity some topics are subjected to. And to related rules for behavior and expression that actually leads to people getting canceled. Not everyone of those is innocent, but some certainly are.
Just to be clear, canceling people because of social transgressions is not a new phenomenon and people most prominently executing it today are not the first to do so.
The things I listed all involve supposed purity (whites are pure, virgin women are pure, gender nonconformism is sexual deviancy which is impure), rules for expression and behavior, and negative consequences for not following said rules.
Just to be clear, canceling people because of social transgressions is not a new phenomenon and people most prominently executing it today are not the first to do so.