> Arguments like these always reminds me of the story where some town had a population register that included religion, and then the Nazis invaded.

I agree that these questions often are asked by those being deceitful, but the reason that works is because it is a dog whistle. Something that hides in normal speech. But we can't presume that someone asking a question like this is in fact dog whistling. If we do, we only enable to whistlers because honest askers will be put off by pretentious and arrogant responses. It is better to answer in good faith until they show their true colors. Even if it is a dog whistle, others will read this public forum and go "why are they attacking someone who is just asking a question?" That gives them power. So let's be honest here.