Do you want people to act like they have just always understood these things? Saying they don't understand might also be a way of opening up the conversation.
Call them stupid, and see how quickly that opening shuts down.
That acronym has gone all over the place, including many extra A's, I's, P's, K's and even 2S+ ... Do not act like people should say nothing unless it's full agreement and affirmation otherwise they're just ignorant, bigoted, stupid, etc.
Not everyone takes their worldview from bite-sized clips and ideological circles on the internet.
You're not doing anyone any favours. The smug, patronising arrogance isn't going to get you very far either.
Beware of identity-hustlers!