Have you just not been paying attention or something?
The exact situation that you described happens a lot closer to home than you may think.
I guess it's probably moderately condescending, but it's hard to do that sort of thing well.
Do note that I said "act astonished" and didn't really insist that you must be ignorant.
The idea that flags here are sensible is hilarious.
Anyway, time to move on.