Don't defer to people when they're clearly lying
There is a pattern that it seems to me rationalist-type people are prone to: 1. Internalize a belief X widely endorsed by society, which has many implications for actions. 2. Notice that people don't actually do the actions that are implied by X. 3. Do actions implied by X really...
That's often false, people also express anger and hatred to:
There are in fact norms agains some (genuine or not) expressions of anger. The question of applying norms is another nontrivial question. Which is why Goofusia's take is plausible (what she is exploiting if you will).