FAA bans an airline (US. Big, big country, lots of power), airline gets pissed off and works on getting re-certification.
CASA bans an airline (Australia. Piss ant country, postures a lot, little power), airline calls Australia racist, knowing that if they pull the racist card Australia will cave, (and know that CASA are gutless and would probably never ban them in the first place), airline has all Australian airlines banned from their country of origin due trumped up reasons.